UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

FORM 10-K

(Mark one)

☒ ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the fiscal year ended December 31, 2015

OR

☐ TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934

For the transition period from:                          to                          

Commission File No. 001-37463

GLAUKOS CORPORATION

(Exact name of registrant as specified in its charter)

(949) 367-9600

(Registrant’s telephone number, including area code)

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None.

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.   Yes  ☐   No  ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Act.   Yes  ☐   No  ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirements for the past 90 days.   Yes  ☒   No  ☐

Indicate by check mark whether the registrant has submitted electronically and posted on its corporate Web site, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).   Yes  ☒   No  ☐

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K is not contained herein, and will not be contained, to the best of the registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  ☒ 

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, or a smaller reporting company. (See definitions of “large accelerated filer”, “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act).

Indicate by check mark whether the registrant is a shell company (as defined in Rule 12b-2 of the Act).  Yes  ☐   No  ☒

As of June 30, 2015, the last business day of the registrant’s most recently completed second quarter, the aggregate market value of common stock held by non-affiliates of the registrant, based on the closing sales price for the registrant’s common stock as reported on The New York Stock Exchange, was $523.2 million. Shares of common stock held by each executive officer, director and by each person who owns 10% or more of the outstanding common stock have been excluded in that such persons may be deemed to be affiliates. The determination of affiliate status is not necessarily a conclusive determination for other purposes.

The number of shares of the Registrant’s common stock outstanding as of March 7,  2016 (latest practicable date) was 32,340,033 shares.

DOCUMENTS INCORPORATED BY REFERENCE

Portions of the Registrant's Proxy Statement for the 2016 Annual Meeting of Stockholders are incorporated herein by reference in Part III of this Annual Report on Form 10-K to the extent stated herein. Such Proxy Statement will be filed with the Securities and Exchange Commission within 120 days of the registrant's fiscal year ended December 31, 2015.

TABLE OF CONTENTS

We use Glaukos, our logo, iStent,  iStent Inject,  iStent Supra,  iDose,  MIGS and other marks as trademarks. This report contains references to our trademarks and service marks and to those belonging to other entities. Solely for convenience, trademarks and trade names referred to in this report, including logos, artwork and other visual displays, may appear without the ® or ™ symbols, but such references are not intended to indicate in any way that we will not assert, to the fullest extent under applicable law, our rights or the rights of the applicable licensor to these trademarks and trade names. We do not intend our use or display of other entities’ trade names, trademarks or service marks to imply a relationship with, or endorsement or sponsorship of us by, any other entity. 

References throughout this document to “we,” “us,” “our,” or “Glaukos” refer to Glaukos Corporation and its consolidated subsidiaries.

SPECIAL NOTE REGARDING FORWARD-LOOKING STATEMENTS AND INDUSTRY DATA

This Annual Report on Form 10-K contains forward‑looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended (Exchange Act). These statements are based on management’s beliefs and assumptions and on information currently available to management. Some of the statements under Item 1 - “Business,” Item 1A - “Risk Factors,” Item 7 - “Management’s Discussion and Analysis of Financial Condition and Results of Operations” and elsewhere in this Annual Report on Form 10-K contain forward‑looking statements. In some cases, you can identify forward‑ looking statements by the following words: “may,” “will,” “could,” “would,” “should,” “expect,” “intend,” “plan,” “anticipate,” “believe,” “estimate,” “predict,” “project,” “potential,” “continue,” “ongoing” or the negative of these terms or other comparable terminology, although not all forward‑looking statements contain these words.

These statements involve risks, uncertainties and other factors that may cause actual results, levels of activity, performance or achievements to be materially different from the information expressed or implied by these forward‑ looking statements. Although we believe that we have a reasonable basis for each forward‑looking statement contained in this report, we caution you that these statements are based on a combination of facts and factors currently known by us and our projections of the future, about which we cannot be certain.

In addition, you should refer to the “Risk Factors” section of this report for a discussion of other important factors that may cause actual results to differ materially from those expressed or implied by the forward‑ looking statements. As a result of these factors, we cannot assure you that the forward‑looking statements in this report will prove to be accurate. Furthermore, if the forward‑looking statements prove to be inaccurate, the inaccuracy may be material. In light of the significant uncertainties in these forward‑looking statements, you should not regard these statements as a representation or warranty by us or any other person that we will achieve our objectives and plans in any specified time frame, or at all. We undertake no obligation to publicly update any forward‑looking statements, whether as a result of new information, future events or otherwise, except as required by law.

This Annual Report on Form 10-K contains market data and industry forecasts that were obtained from industry publications. These data involve a number of assumptions and limitations, and you are cautioned not to give undue weight to such information.  Although we believe that the industry publications on which the market and industry statements are based are reliable and we are not aware of any misstatements regarding any market data or industry forecasts presented herein, we have not independently verified any of the third party information. Statements in this Annual Report on Form 10-K regarding our market position, market opportunity, market size and our general expectations involve risks and uncertainties and are subject to change based on various factors, including those discussed under Item 1A - “Risk Factors” and Item 7 - “Management’s Discussion and Analysis of Financial Condition and Results of Operations” included elsewhere in this Annual Report on Form 10-K.

PART I

ITEM 1.BUSINESS

Overview

We are an ophthalmic medical technology company focused on the development and commercialization of breakthrough products and procedures designed to transform the treatment of glaucoma, one of the world’s leading causes of blindness. We have pioneered Micro‑Invasive Glaucoma Surgery (MIGS) to revolutionize the traditional glaucoma treatment and management paradigm. We launched the iStent, our first MIGS device, in the United States in July 2012 and we are leveraging our platform technology to build a comprehensive and proprietary portfolio of micro‑scale injectable therapies designed to address the complete range of glaucoma disease states and progression. We believe the iStent is the smallest medical device ever approved by the Food and Drug Administration (FDA), measuring 1.0 mm long and 0.33 mm wide.

Glaucoma is a group of eye diseases characterized by progressive, irreversible and largely asymptomatic vision loss caused by optic nerve damage, which is most commonly associated with elevated levels of pressure within the eye, or intraocular pressure. Elevated intraocular pressure often occurs when aqueous humor, the thin watery fluid that fills the front part of the eye, is not circulating normally and draining properly. According to Market Scope, more than 80 million people worldwide have glaucoma, a number it expects to grow to more than 90 million by 2020. This estimate includes approximately 4.3 million people with glaucoma in the United States, growing to approximately 4.8 million by 2020. Glaucoma is a chronic condition that progresses slowly over long periods of time and can have a devastating impact on a patient’s vision and quality of life.

Reducing intraocular pressure is the only proven treatment for glaucoma. Glaucoma has traditionally been treated through a range of approaches that often require patients to use multiple types of prescription eye drops for the rest of their lives, and sometimes undergo complex and invasive eye surgery. Prescription eye drops, which are estimated to account for approximately $4.7 billion in global sales in 2015, according to Market Scope, are often used to control intraocular pressure throughout glaucoma progression. Unfortunately, these medications can be ineffective over time due to patient noncompliance and other factors. Complex and invasive glaucoma surgical options are typically reserved for more advanced disease and have remained largely unchanged since the 1970’s.

We developed MIGS to address the shortcomings of current glaucoma treatment options. MIGS procedures involve the insertion of a micro‑scale device from within the eye’s anterior chamber through a small corneal incision. MIGS devices reduce intraocular pressure by restoring the natural outflow pathways for aqueous humor. Based on clinical studies and published reports, we believe MIGS procedures are safer, preserve more eye tissue and result in faster recovery times and fewer complications than invasive glaucoma surgical options.

The iStent is the first commercially available MIGS treatment solution. FDA‑approved for insertion in combination with cataract surgery, the iStent has been shown to lower intraocular pressure in adult patients with mild‑to‑moderate open‑angle glaucoma, which represents the majority of glaucoma cases. The iStent procedure is currently reimbursed by Medicare and a majority of commercial payors and we have sold more than 140,000 iStent devices worldwide.

We are building a broad portfolio of micro‑scale injectable therapies designed to address the complete range of glaucoma disease states and progression, including three innovative pipeline products: the iStent Inject, the iStent Supra and iDose. The iStent Inject includes two stents pre‑loaded in an auto‑injection inserter. We are developing two versions of this product: the first is currently being studied for lowering intraocular pressure in conjunction with cataract surgery in a U.S. investigational device exemption (IDE) pivotal trial; the second is currently being studied in an initial U.S. IDE study as a standalone treatment for lowering intraocular pressure. This second version is also capable of making its own self‑sealing corneal penetration, potentially offering patient treatment in a minor surgical suite or an in‑office setting. The iStent Supra is designed to access an alternative drainage space within the eye where we estimate 20% of aqueous humor outflow occurs, and is now in a U.S. pivotal IDE trial. iDose is an implant that is designed to continuously deliver therapeutic levels of medication from within the eye for extended periods of time to lower intraocular pressure in glaucoma patients. To validate the safety and efficacy of our iStent products, we are currently conducting 17 prospective clinical trials.

Our corporate headquarters and production facilities are located in Laguna Hills, California, and as of December 31, 2015, we had 182 employees. We have built and are continuing to grow our commercial organization, which includes a direct sales force in the United States, Germany, Australia and Canada, and distribution partners in Europe, Asia Pacific and other targeted international geographies. Information about geographic revenue is set forth in Note 13 of our notes to consolidated financial statements included in Part II, Item 8 of this Annual Report on Form 10-K.

Our net sales increased to $71.7 million in 2015 from $45.6 million in 2014 and $20.9 million in 2013, and our net losses were $38.3 million, $14.1 million and $14.2 million for the years ended December 31, 2015, 2014 and 2013, respectively.

Our Market Opportunity

According to Market Scope, more than 80 million people worldwide have glaucoma, a number it expects to grow to more than 90 million by 2020. This estimate includes approximately 4.3 million people with glaucoma in the United States, growing to approximately 4.8 million by 2020. Market Scope estimates 2015 global sales of products used to treat glaucoma patients to be approximately $5.1 billion, growing to approximately $7.1 billion in 2020. Open‑angle glaucoma is the most common form of the disease. Approximately 3.5 million people in the United States have open‑angle glaucoma, growing to approximately 3.8 million by 2020 according to Market Scope. Despite therapeutic options that attempt to manage disease progression, researchers estimate that 8.4 million people were bilaterally blind from glaucoma in 2010, with this figure forecasted to rise to 11.1 million by 2020.

Many factors are driving significant growth in the glaucoma market. Populations worldwide in both mature and emerging markets are growing and aging, while life expectancies continue to rise. Treatment of glaucoma is expected to increase due to better healthcare access globally and advances in glaucoma technology designed to provide earlier diagnosis and more cost‑effective treatment to a larger portion of the glaucoma population.

Care for glaucoma patients in the United States is administered by many of the approximately 18,900 ophthalmologists who diagnose the disease and provide medical management according to Market Scope. There are more than 8,000 ophthalmic surgeons in the United States focused on performing cataract or glaucoma procedures. These ophthalmic surgeons perform approximately 3.8 million cataract surgeries annually in the United States according to Market Scope. We believe that approximately 20% of cataract surgeries are performed on patients also diagnosed with open‑angle glaucoma and/or ocular hypertension. Appropriate treatment options are determined based on the progression and severity of the disease and include medical management with prescription pharmaceuticals, laser therapy, surgical therapy and now MIGS.

Glaucoma Treatment Overview and Limitations

Glaucoma and the eye’s drainage system

Glaucoma is a group of eye diseases characterized by progressive, irreversible and largely asymptomatic vision loss in which elevated levels of intraocular pressure are often associated with optic nerve damage. While some glaucoma patients do not experience an increase in intraocular pressure, it is widely considered a major risk factor in glaucoma’s progression and reduction in intraocular pressure is the only clinically proven treatment. Elevated intraocular pressure occurs when aqueous humor is not circulating normally and properly drained from the front part of the eye. Normally, this fluid flows through the trabecular meshwork, an area of spongy mesh‑like tissue in the eye located around the base of the cornea, and into Schlemm’s canal, a circular channel in the eye that collects the aqueous humor and delivers it back into the bloodstream. This trabecular meshwork pathway is also known as the conventional outflow pathway.

A second outflow pathway is located in the suprachoroidal space, which lies between the sclera and the choroid, where we estimate 20% of the eye’s total aqueous humor outflow occurs. This pathway is also known as the unconventional or uveoscleral pathway. The suprachoroidal space is characterized as an area of less venous resistance to aqueous humor outflow than Schlemm’s canal.

The following image depicts the blockage of aqueous humor outflow in an eye with open‑angle glaucoma.

Open‑angle glaucoma is the most common type of glaucoma. In open‑angle glaucoma, structures of the eye may appear normal, but aqueous humor outflow through the trabecular meshwork and into Schlemm’s canal is reduced due to gradual degeneration and obstruction. Direct causes of this blockage are unknown, but the disease is linked to age, ethnicity and hereditary factors. Loss of aqueous humor absorption leads to increased resistance and thus a chronic, painless buildup of pressure in the eye.

Glaucoma is a progressive disease that can be categorized based by severity levels ranging from ocular hypertension (or pre‑glaucoma) to severe glaucoma, as shown in the chart below. According to industry experts, mild‑to‑moderate glaucoma patients account for a majority of the population. An eye doctor usually diagnoses glaucoma as part of a comprehensive exam that includes measuring intraocular pressure and corneal thickness, evaluating optic nerve damage and testing visual fields. Intraocular pressure is measured in millimeters of mercury (mm Hg), with normal eye pressures ranging from 10 to 21 mm Hg. Glaucoma is typically characterized by an intraocular pressure greater than 21 mm Hg.

An eye doctor will monitor optic nerve damage by tracking the cup to disc (C:D), ratio. This exam measures the diameter of the optic disc (the round area in back of the eye where retinal nerve fiber layers collect to form the optic nerve) relative to the diameter of the optic cup (the center of the optic disc). Expansion and deepening of this optic cup indicates damage. Visual field, or perimetry, tests are used to check for peripheral vision impairment in one or more

quadrants. Once diagnosed, the treatment goal in all cases is to control intraocular pressure. Glaucoma progression stages are described in the following chart.

Glaucoma treatment overview

The traditional treatment of glaucoma encompasses a variety of medication regimens, laser and surgical methods to lower intraocular pressure.

Multiple clinical trials have shown that medications can reduce intraocular pressures to baseline targets that can minimize vision loss. However, poor adherence to and lack of persistence with glaucoma medication regimens have been documented in numerous independent studies, which often place the incidence of patient noncompliance up to or above 50%, particularly in patients on two or more prescription eye drops. Even daily glaucoma single medication use has been associated with noncompliance rates as high as 75%.

According to Market Scope, more than 47% of patients use two or more prescription eye drops. Furthermore, because glaucoma progresses slowly and with few symptoms, patients often do not adhere to their medication regimens as prescribed until the disease has progressed to the point of significant vision loss. As a result, despite the availability of medication therapies to combat glaucoma, progressive visual loss and blindness still occur. According to a study published in 2014, 15% of glaucoma patients progress to blindness within 20 years of diagnosis.

Laser treatments have been developed to provide an alternative to lifelong medication treatments. Laser procedures are typically performed at an outpatient surgical center and involve the use of lasers to create changes in eye tissue and improve aqueous humor outflow. Ophthalmic surgeons may perform laser procedures as initial treatment, or for patients who are noncompliant with prescription eye drops or whose intraocular pressure is not well controlled by medications. According to Market Scope, selective laser trabeculoplasty (SLT) is the most frequently performed glaucoma laser procedure in the United States. Although SLT can help to lower intraocular pressure, the procedure’s effectiveness often wears off within one to five years, according to the Glaucoma Research Foundation. While a second procedure can be performed, the results of repeated laser surgeries are less predictable and less effective than those of the first surgery. Additionally, medication therapy may still be required post‑treatment.

Where medication therapy and laser treatment are unsuccessful in managing glaucoma, invasive surgical procedures such as trabeculectomies or implantation of tube shunts are performed, usually as outpatient procedures. In a

trabeculectomy, the surgeon cuts open the conjunctiva and sclera to create flaps, and removes a plug of scleral tissue and sometimes a portion of the trabecular meshwork to create an opening into the anterior chamber. The conjunctiva and sclera flaps are sutured back down and a small blister, or bleb, is created between the conjunctiva and sclera. The surgery results in a new drainage channel that allows increased outflow of aqueous humor into the bleb. While some patients experience significant reductions in intraocular pressure, trabeculectomy failure rates can approach 50% according to published research. A common complication is scarring, which can prevent fluid drainage from the eye and interfere with the proper function of the bleb. If the bleb doesn’t work properly, more surgery may be needed. Among the other complications associated with trabeculectomies are blurred vision, bleeding in the eye, bleb leaks, low intraocular pressure, or hypotony, infection, persistent corneal edema, choroidal detachment and cataract development. Implantations of tube shunts, devices that divert the aqueous humor from the anterior chamber, are generally reserved for eyes in which a trabeculectomy has failed or has a poor likelihood of success. A tube shunt surgery is similar to a trabeculectomy, except that the device’s tube is inserted through the scleral channel to maintain the channel, and the device’s reservoir end is placed deep under the conjunctiva to maintain the drainage space. While invasive glaucoma surgery often leads to significant reductions in intraocular pressure, it is associated with high long‑term failure rates, long recovery times and significant complication risks. Additionally, as with laser treatment, the effects may dissipate over time, requiring additional procedures, and medication therapy may still be required post‑treatment.

We believe that because of the limitations of medications and laser and the morbidity associated with invasive surgical therapies, a clear unmet medical need exists in the management of open‑angle glaucoma patients.

Our Solution

We pioneered the development of MIGS in order to address the shortcomings of current pharmaceutical and surgical options, and in doing so have established an entirely new market segment within the global glaucoma marketplace. We believe that by using our core competencies to develop, manufacture and obtain regulatory approval for products incorporating our proprietary technologies, we have created a platform capable of disrupting and revolutionizing the traditional glaucoma treatment and management paradigm.

In contrast to invasive surgical approaches, MIGS procedures access the anterior chamber of the eye through small corneal incisions or penetrations. MIGS procedures reduce intraocular pressure by restoring the natural physiologic pathways for aqueous humor outflow. Based on clinical studies and published reports, we believe MIGS procedures are safer, preserve more eye tissue and result in faster recovery times and fewer complications than invasive glaucoma surgical options.

We launched our first micro‑scale MIGS treatment solution, the iStent, in the United States following FDA approval in June 2012. We believe the iStent represents the next generation in glaucoma surgical innovation and it is the first FDA‑approved surgical device available for insertion in conjunction with cataract surgery for the reduction of intraocular pressure in adult patients with mild‑to‑moderate open‑angle glaucoma. The iStent is a micro‑bypass stent made of surgical‑grade non‑ferromagnetic titanium that is coated with heparin. An extensive history of development efforts preceded the current form of the iStent, with contribution by our Caltech‑associated founder, during which more than 80 prototype iterations were produced. Packaged in a sterile, pre‑loaded configuration, the iStent is inserted through the small corneal incision made during cataract surgery and placed into Schlemm’s canal, a circular channel in the eye that collects aqueous humor and delivers it back into the bloodstream. Once inserted, the iStent improves aqueous humor outflow while fitting naturally within Schlemm’s canal. The ergonomic rail design protects and accesses underlying collector channels while the iStent’s three retention arches ensure secure placement. The iStent is currently approved only for insertion in conjunction with cataract surgery because this was the product usage in the U.S. IDE clinical trial information that was included in the premarket approval (PMA).

The iStent is rated “MRI Conditional” by the American Society for Testing and Materials. This means that a patient implanted with the iStent can be scanned safely via magnetic resonance imaging (MRI) under the following conditions specified on the product label: static magnetic field of 3‑Tesla or less, and maximum spatial magnetic field gradient of 4,000‑Gauss/cm or less. Therefore, it may not be safe for iStent recipients to undergo MRIs in environments that do not match these specified conditions; however, the vast majority of MRI systems in use in the United States today are rated 3‑Tesla or less. Following implantation of an iStent, the surgeon is instructed to provide to the patient a wallet‑sized patient identification card citing the model and serial number of the device, implant date, and surgeon’s

name along with the aforementioned MRI conditions. The surgeon is also instructed to advise the patient that the patient identification card contains important information related to the iStent and that the card should be shown to their current and future health care providers.

The image below left shows a gloved hand holding the pre‑loaded iStent inserter; the image below center is a magnified view of the insertion tip and iStent device; the image below right shows an iStent on the tip of a finger (inside circle).

The following series of graphics illustrates the insertion of an iStent into the eye: (left) the pre‑loaded iStent inserter enters the anterior chamber through a small corneal incision made during cataract surgery; (center) a gonioscope is used to visualize Schlemm’s canal; (right) the iStent is inserted into Schlemm’s canal.

The following series of graphics illustrates the effect of iStent in the eye: (left) after placement of the iStent, aqueous humor outflow is restored; (right) close‑up illustration of iStent placement in Schlemm’s canal.

In combination with cataract surgery, the iStent has been clinically proven to decrease intraocular pressure. We believe the iStent provides numerous benefits that address the significant unmet need for a durable and effective glaucoma treatment earlier in the treatment paradigm. These benefits include:

Reduces intraocular pressure.  In the pivotal U.S. clinical trial, after one year, 68% of mild‑to‑moderate open‑angle glaucoma patients who received the iStent in combination with cataract surgery remained medication free while sustaining target intraocular pressures of ≤ 21 mm Hg, a level consistent with normal, non‑glaucomatous eyes. In the same trial, 64% of patients who received the iStent remained medication free while sustaining a mean intraocular pressure reduction of 20% compared to baseline.

Facilitates compliance, convenience.  The iStent is designed to establish continuous outflow of aqueous fluid for sustained reduction in intraocular pressure. This mechanism is intended to assure uninterrupted therapy, thus overcoming the primary limitation of patient noncompliance to prescribed eye drop regimens. By reducing intraocular pressure on a sustained basis, iStent efficacy does not depend on patients remembering to use their prescription eye drops. Re‑establishing normal, steady‑state physiologic outflow of aqueous humor may reduce the large fluctuations in intraocular pressure that occur throughout the day in glaucoma patients. These large fluctuations in intraocular pressure have been shown in independent studies to be a significant risk factor in glaucoma progression.

Safe procedure and rapid recovery.  Clinical studies have demonstrated that inserting the iStent in combination with cataract surgery yields an overall safety profile and recovery rate similar to cataract surgery alone, a surgery that has minimal complications and is the most commonly performed ophthalmic procedure today. The iStent procedure is not associated with the complication risks of invasive glaucoma surgery, and it also spares conjunctival tissue, or the clear skin that covers the sclera, enabling rapid recovery and preserving the potential for future glaucoma treatment options.

Broad segment of ophthalmic practitioners can perform procedure.  Because the iStent procedure is straightforward, a broad segment of ophthalmic surgeons can effectively perform the MIGS procedure to insert an iStent. We believe this characteristic increases the procedure’s appeal and utilization as an early and effective treatment option for ophthalmic surgeons.

Our Pipeline

Our research and development goal is to leverage our core capabilities in MIGS‑based design and development to create a full portfolio of micro‑scale injectable therapies for glaucoma management. We have developed a series of innovative products, in varying stages of development, that are designed to expand market penetration and adoption,

further enhance ease of use for surgeons, reach a wider glaucoma patient population and broaden our offering for glaucoma management in order to address the complete range of glaucoma disease states and progression:

iStent Inject trabecular micro‑bypass stent.  The iStent Inject is approximately one‑third the size of the iStent and relies on a similar method of action to improve aqueous humor outflow into Schlemm’s canal and reduce intraocular pressure. Packaged in a two‑stent, preloaded, auto‑inject mechanism, the iStent Inject allows the surgeon to inject these stents into multiple trabecular meshwork locations through a single corneal entry with the goal of achieving greater intraocular pressure reduction. We are developing two versions of this product. One version of the iStent Inject is currently being evaluated in a pivotal U.S. IDE clinical trial for the reduction of intraocular pressure in mild‑to‑moderate open‑angle glaucoma in combination with cataract surgery. A second version of the iStent Inject is designed to make its own self‑sealing corneal needle penetration to achieve insertion without an incision. An initial U.S. IDE study is currently underway to evaluate this second version of the device as a stand‑alone procedure in glaucoma patients who are not undergoing concurrent cataract surgery. Both versions of the iStent Inject have been approved for marketing in the European Union and Canada and are currently in a commercial launch in Germany and Canada. The version of the iStent Inject that may be used for the reduction of intraocular pressure in mild‑to‑moderate open angle glaucoma in combination with cataract surgery is approved for marketing and currently in a commercial launch in Australia.

The image below left is the iStent Inject injection system, pre‑loaded with two iStent Inject devices; the image below center is a magnified view of two iStent Inject devices; the image below right shows two iStent Inject devices on a penny (inside circle).

iStent Supra suprachoroidal micro‑bypass stent.  The iStent Supra is designed to reduce intraocular pressure by accessing the suprachoroidal space in the eye, an area that we estimate is responsible for 20% of its total aqueous outflow. We believe that the iStent Supra device could be used alone to lower intraocular pressure or in combination with the iStent or the iStent Inject to achieve even lower intraocular pressure in patients with progressive or more advanced open‑angle glaucoma. An international study showed the iStent Supra achieved a 30% pressure reduction in comparison to the unmedicated baseline at 12 months. A U.S. pivotal IDE trial for the iStent Supra used in conjunction with cataract surgery to lower intraocular pressure is underway. The iStent Supra device has already been approved for marketing in the European Union.

The image below left is a magnified view of the iStent Supra; the image below center illustrates the iStent Supra device implanted into the suprachoroidal space of the eye; the image below right shows the iStent Supra device on the tip of a finger (inside circle).

iDose.  The iDose is a targeted injectable drug delivery implant that uses our micro‑scale platform. The iDose implant is designed to be pre‑loaded into a small gauge needle and injected into the eye via a self‑sealing corneal needle penetration, where it is secured within the eye. Once secured in the eye, the iDose is designed to continuously deliver therapeutic levels of medication from within the eye for extended periods of time. The titanium implant is comparable in size to the Company’s other proprietary MIGS devices. It is filled with a special formulation of travoprost, a prostaglandin analog used to reduce elevated intraocular pressure. The implant is capped with a membrane that is designed for continuous controlled drug elution into the anterior chamber. When depleted, the implant can be removed and replaced in a similar, subsequent procedure. Glaukos has designed the product to be an alternative to chronic, daily prescription eye drop treatments, which may have high rates of patient noncompliance and cause long‑term ocular surface damage to glaucomatous eyes. In November 2015, the Company submitted an Investigational New Drug (IND) application to the FDA seeking authorization to study the iDose delivery system for investigational use in the reduction of elevated intraocular pressure in patients with glaucoma. In the IND application, we proposed to conduct a randomized and 12-week masked Phase II clinical trial to assess the safety and preliminary efficacy of two models of the iDose delivery system with different travoprost elution rates compared to topical timolol maleate ophthalmic solution, 0.5%. In addition, the IND application included information on travoprost’s history of safety and efficacy, as well as Glaukos’ preclinical program and early data from an initial international clinical trial on the iDose implant involving 69 patients. In this initial international study, subjects were randomized to receive either one of two models of the implant, each with different elution rates, or topical travoprost. Through 12 months, mean intraocular pressure was lower in the implant groups than in the topical medication group. The results from this initial trial demonstrated that both implant models had a potent intraocular pressure‑lowering effect and that the implants were generally well‑tolerated. In December 2015, the FDA allowed the Phase II clinical trial of iDose to proceed. We plan to initiate the Phase II clinical trial for iDose in early 2016. 

Our injectable therapies could further transform the glaucoma patient value proposition. We believe newly diagnosed glaucoma patients, and mild‑to‑moderate open‑angle glaucoma patients who have failed on medication therapy, or those who are noncompliant with their prescribed eye drop regimens, could have iStent or iDose injectable therapy as a meaningful alternative to lifelong treatment with prescription eye drops. Our simple, straightforward injectable solutions may reduce the daily need, side effects and cost of prescription eye drops.

Research & Development

We are leveraging our micro‑scale technology platform to address the full range of glaucoma disease states and progression and to fundamentally change the way glaucoma patients are treated. Our research and development efforts are focused primarily on continuous improvement of our iStent designs and injector systems and improvements to our proprietary MIGS platform. Our research and development objectives are:

As of December 31, 2015, our research and development team consisted of 66 employees. Our research and development process is supported by multiple clinical research programs and regulatory affairs activities. We currently have 17 prospective clinical trials underway. In addition, our technologies have been discussed in 40 articles published in peer‑reviewed journals to date. Our research and development expenses were approximately $25.0 million, $19.2 million and $15.5 million in the years ended December 31, 2015, 2014 and 2013, respectively. We expect our research and development expenditures to increase as we continue to devote significant resources to clinical trials and regulatory approvals of our new products.

iStent clinical validation

The iStent pivotal U.S. clinical trial that served as the basis for the FDA approval of our PMA application by the FDA was the first prospective, randomized, open‑label, multi‑center, controlled U.S. IDE clinical trial ever to be conducted in support of a glaucoma device. A total of 29 U.S. investigational sites participated in the trial, which demonstrated that insertion of the iStent in patients undergoing cataract surgery provided clinically and statistically significant improvements in intraocular pressure and an overall safety profile similar to cataract surgery alone.

To be enrolled in the trial, subjects were required to have mild or moderate open‑angle glaucoma with visual field or nerve pathology characteristic of glaucoma, a C:D ratio of 0.8 or less, and intraocular pressure ≤ 24 mm Hg while taking one to three prescription eye drops. After discontinuation of glaucoma medications, intraocular pressure was required to be between 22 mm Hg and 36 mm Hg. Excluded from the trial were individuals with severe glaucomatous field defects, severely uncontrolled intraocular pressure, angle closure glaucoma, neovascular, uveitic or angle recession glaucoma, prior glaucoma surgery other than iridectomy, prior refractive procedures, known corticosteroid responders, ocular disease that would affect safety, monocular subjects or those with fellow eye best corrected visual acuity, or BCVA, worse than 20/200. In this study, the “p” values were statistical calculations to determine whether the effects of receiving the iStent in conjunction with cataract surgery were significant in comparison to cataract surgery alone based on pre‑specified statistical targets. We specified that any result where p ≤ .05 would be significant.

A total of 240 eyes (239 subjects) were randomized, of which 117 were randomized to receive the iStent in conjunction with cataract surgery (treatment group) and 123 to cataract surgery only (control group). Of the 117 eyes randomized to the treatment group, 111 underwent insertion of the iStent in conjunction with cataract surgery. Of the 123 eyes randomized to receive cataract surgery only, 117 eyes underwent cataract surgery. At the 12‑month visit, subject accountability was 97% in the treatment group and 99% in the control group. After the randomized phase of the trial, an additional 50 subjects were enrolled for the safety purposes in the non‑randomized phase.

Pivotal trial efficacy data

Of subjects in the treatment group, 68% achieved the primary efficacy endpoint of an intraocular pressure ≤ 21 mm Hg without prescription eye drops at 12 months, compared to 50% for the control group (p = 0.004). Of subjects in the treatment group, 64% achieved the secondary efficacy endpoint of intraocular pressure reduction ≥ 20% without prescription eye drops at 12 months, compared to 47% in the control group (p = 0.010). Throughout the postoperative period, prescription eye drops were prescribed in a lower proportion of patients, and initiated later, in the treatment group than in the control group. At 12 months, 85% of treatment group subjects were medication free compared to 65% of control group subjects at 12 months.

Pivotal trial safety data

The following table provides information on the most common adverse events reported in the pivotal trial.

The overall rate of adverse events was similar between the treatment and control groups and no unanticipated adverse device complications were reported. The trial showed that when inserted in conjunction with cataract surgery for subjects with mild‑moderate open‑angle glaucoma, the benefits of the iStent procedure exceeded its risks.

Additional iStent studies

Two‑year results from the pivotal trial showed relatively similar outcomes, although it was not designed nor statistically powered for two‑year efficacy endpoints. Numerous other studies performed in Western Europe and the United States evaluating the iStent in combination with cataract surgery have found statistically significant reductions in mean intraocular pressure and medication use. For example, in a prospective, double‑masked, randomized controlled trial on 36 patients with cataract and primary open‑angle glaucoma, patients who received a single iStent in conjunction with cataract surgery showed an intraocular pressure decline to 14.8 mm Hg from 17.9 mm Hg at 15 months. This compared to an intraocular pressure decline to 15.7 mm Hg from 17.3 mm Hg in patients who underwent cataract surgery only. This trial included a washout of medications at 15 months in order to remove the confounding effect of glaucoma medications and, at 16 months, intraocular pressure was 16.6 mm Hg in the combined group, compared to 19.2 mm Hg in the cataract surgery‑only group.

Two other Western European studies have demonstrated the sustained efficacy and safety of a single iStent inserted in combination with cataract surgery after three or more years of postoperative follow up. In one international prospective, non‑comparative, uncontrolled, non‑randomized, interventional case series study, 19 subjects with mild‑to‑moderate open‑angle glaucoma underwent iStent implantation in conjunction with cataract surgery. At a mean follow‑up of 53 months, patients’ mean intraocular pressure was 16.3 mm Hg, compared to preoperative medicated intraocular pressure of 19.4 mm Hg. In 42% of patients, no glaucoma medications were used at the end of follow‑up and the mean number of prescription eye drops used by the patients declined to 0.8 from 1.3 medications preoperatively.

The other Western European study, a prospective, open‑label, non‑randomized study, assessed the long‑term postoperative outcomes of one iStent implanted during cataract surgery in subjects with primary open‑angle glaucoma, pseudoexfoliation glaucoma, secondary or post‑traumatic glaucoma or ocular hypertension. There was no preoperative medication washout period and 40% of eyes had undergone previous glaucoma surgeries, primarily laser procedures. In the study, a single iStent was implanted through the same incision used for cataract surgery in a consecutive series of 62 eyes of 43 subjects. In 39 eyes followed through three years, the mean intraocular pressure at three years was 14.9 mm Hg, compared to a mean preoperative intraocular pressure of 23.4 mm Hg, representing a 36% decline. In the same 39 eyes, the mean number of glaucoma medications used three years following surgery declined to 0.3, compared to a mean of 1.9 medications at subjects’ preoperative visits, representing an 86% reduction. No operative complications occurred during the cataract surgical procedure or during the stent implantation procedure. Over the three‑year follow‑up period, five secondary surgeries, two postoperative ocular sequelae and two non‑ocular adverse events were reported.

Additional iStent studies with multiple stents in standalone procedures

In a prospective, pilot study in Eastern Europe, 39 phakic and pseudophakic subjects with open‑angle glaucoma and preoperative unmedicated intraocular pressure between 22 mm Hg and 38 mm Hg received two iStents in a standalone procedure. At 36 months, subjects not taking medication achieved mean intraocular pressure of 15.2 mm Hg, representing a 37% reduction from unmedicated baseline intraocular pressure. In four subjects who required medication, intraocular pressure ranged from 13 mm Hg to 15.7 mm Hg at 36 months. There were no postoperative adverse events related to stent implantation, except for one incidence of early postoperative hyphema that resolved at one week. The study is designed for follow‑up through five years.

In another international prospective, randomized study, 119 subjects with open‑angle glaucoma and preoperative unmedicated intraocular pressure between 22 mm Hg and 38 mm Hg received one, two or three iStents in a standalone procedure. In this study, the number of stents was based on randomization and not on each glaucoma patient’s specific needs. The study design included a primary efficacy endpoint of ≥ 20% intraocular pressure reduction at 12 months from baseline unmedicated intraocular pressure without use of prescription eye drops or secondary glaucoma procedures. The secondary efficacy endpoint was intraocular pressure ≤ 18 mm Hg at 12 months without use of prescription eye drops or secondary glaucoma procedures. Approximately 89%, 90% and 92% of the one‑, two‑ and three‑stent groups met the primary and secondary endpoints, respectively. In addition, at 18 months, mean unmedicated intraocular pressure was 15.9 mm Hg, 14.1 mm Hg and 12.2 mm Hg in the one‑, two‑ and three‑stent groups, respectively. No intraoperative ocular adverse events occurred and safety data were similar across all stent groups. By month 18, four eyes had undergone cataract surgery due to progression of cataract. Under the study design, follow‑up will continue through five years.

To show the benefits of combining trabecular meshwork stents and suprachoroidal stents to achieve dual physiologic outflow in patients with severe glaucoma, 80 failed trabeculectomy patients received two iStents, one iStent Supra and one prescription eye drop in an international study. In 49 patients followed through 12 months, mean intraocular pressure declined 49% to 13.4 mm Hg, compared to a baseline intraocular pressure of 26.4 mm Hg. In addition, 100% of patients met the primary endpoint of ≥ 20% reduction in intraocular pressure at 12 months.

Sales and Marketing

In the United States, we sell our products through a direct sales organization that, as of December 31, 2015, consisted of 65 sales professionals, including regional business managers, sales directors, clinical relations personnel and reimbursement specialists. Our sales organization is primarily responsible for training ophthalmic surgeons on the iStent procedure, helping these physicians integrate the technology into their practices and providing resources to support reimbursement, while also identifying and supporting investigational sites for clinical trials of our pipeline technologies. We continue to recruit experienced sales professionals with extensive sales and/or clinical experience in ophthalmic medical technologies. Our weighted average number of domestic sales representatives increased to 45 for the year ended December 31, 2015 from 35 for the year ended December 31, 2014. The higher number of sales representatives in each period helped increase our customer base, leading to growth in unit sales. Increased unit volume was responsible for the majority of the increase in net sales for the three months and year ended December 31, 2015.

We invest significant time and expense to provide comprehensive training to our sales professionals so that they are proficient in all aspects of our iStent technologies, including features and benefits, procedure techniques and reimbursement. In addition, we provide technical education regarding the eye’s anatomy, glaucoma diagnosis, disease states and treatment, and cataract surgery.

Outside the United States, we sell our products primarily through a network of distribution partners located in markets where we see the greatest potential for iStent adoption. In late 2013, we formed a wholly‑owned subsidiary in Germany that employs five direct sales representatives. In early 2015, we formed a wholly‑owned subsidiary in Japan that employs five direct sales representatives. We intend for this subsidiary to commence a commercial launch in the event we receive regulatory approval to market the iStent in Japan. Following our initial public offering (IPO), we formed wholly‑owned subsidiaries in Australia and Canada. In Australia, we have hired a general manager and five direct sales representatives who commenced a commercial launch in January 2016. In Canada, we have hired a general manager and five direct sales representatives who commenced a commercial launch in January 2016. We continually

monitor our international sales progress and will consider conversion to a direct sales approach on a country‑by‑country basis, depending on our assessment of market conditions, net sales and profitability trends, reimbursement coding and coverage potential, and other factors. As of December 31, 2015, we had agreements with approximately 17 distributor organizations. No single distributor accounted for more than 10% of our total net sales for the years ended December 31, 2015, 2014 or 2013.

Our global sales efforts and promotional activities are currently aimed at ophthalmic surgeons and other eye care professionals. Our primary customers include ophthalmic surgeons, hospitals and ambulatory surgery centers (ASCs). We require physicians to complete a mandatory training program before commencing iStent procedures. To facilitate this, we have developed a multi‑faceted education program that includes interactive webinars, wet‑lab training, in‑office didactic sessions, observation of surgical cases and off‑site information seminars. We also offer physician‑to‑physician training that involves preoperative diagnostics, procedure assistance and postoperative consultations. We believe our education and training programs enable ophthalmic surgeons and other eye care professionals to improve patient outcomes and satisfaction with the iStent and procedure.

We support our sales organization with marketing programs and initiatives designed to build awareness and appreciation for our iStent technologies. These include advertisements and editorial coverage in professional publications, exhibits at major ophthalmic congresses and meetings, MIGS and iStent user meetings, and targeted direct‑to‑consumer marketing efforts.

Reimbursement

United States reimbursement

Reimbursement for iStent procedure

There are three key aspects of reimbursement in the United States:

In 2008, in consultation with and with the approval of the American Academy of Ophthalmology, we applied for and received a temporary Category III CPT code to describe insertion of devices such as the iStent using MIGS procedures.

Category III codes expire five years after the date they become effective. Prior to expiration, there are two options: submit an application to convert to a Category I code; or submit an application for a five year extension of Category III status. CPT code 0191T, which describes the insertion of the iStent and iStent Inject devices, first became effective in 2008. Prior to expiration, an application for a five-year extension was approved in 2012 and expires on December 31, 2018. We will need to either submit an application to convert CPT code 0191T to a Category I code or apply for another five-year extension by June 2017 in order for the new code to be effective by January 1, 2019.

We also successfully applied for, and the American Medical Association created, a new CPT code 0253T, which describes the insertion of the iStent Supra device, in 2011. An application for a five-year extension was approved at the same time as the application for the extension of CPT code 0191T. We will need to either submit an application for a Category I code or apply for another five‑year extension by June 2017.

The iStent is approved by the FDA for reduction of intraocular pressure in adult patients with mild‑to‑moderate open‑angle glaucoma undergoing cataract surgery who are currently treated with prescription eye drops. Based on data released by Centers for Medicare & Medicaid Services (CMS) regarding total cataract surgery volume in the Medicare Fee for Service program and data published by Market Scope, we estimate that Medicare pays for 70% of all cataract surgeries performed in the United States. Due primarily to strong published clinical data, including the FDA pivotal trial, all MACs had begun covering the iStent procedure by February 2013, approximately seven months after FDA approval.

We estimate that 20% of patients who meet the FDA indication for iStent insertion are covered by private health insurance companies, and we have secured positive coverage policies for iStent insertion with many of these private payors. As of December 31, 2015, we had secured reimbursement for the iStent insertion for approximately 80% of individuals covered by private insurance. These include United HealthCare, CIGNA, Aetna and all Blue Cross and Blue Shield (BCBS) plans except Anthem BCBS, Humana and Tricare. The positive coverage by most of the BCBS plans is a result of medical policy issued by the BCBS Association (national) in October 2013 stating that iStent insertion is considered medically necessary for mild‑to‑moderate open‑angle glaucoma patients undergoing cataract surgery. While BCBS plans, which are independent licensees, are not required to follow BCBS national guidelines, the majority of the plans do so. We continue to work with private insurance providers in an effort to broaden coverage for the iStent procedure.

iStent insertion in the United States is almost always performed in an outpatient setting and virtually all U.S. iStent sales are to ASCs and hospital outpatient departments (HOPDs). At the average facility, 70% of claims reporting iStent insertion with cataract surgery will be processed and paid for by Medicare. National payment rates by Medicare to ASCs and HOPDs are determined each year through a complex formula, which takes into account reported costs for each claim submitted. When two procedures are performed in an ASC on the same patient on the same day (e.g.,  iStent insertion and cataract surgery), Medicare reduces the payment of the lower‑paying procedure by 50%. The ASC facility payment for cataract surgery is generally lower than the payment for iStent insertion. Therefore, when these two procedures are performed together in an ASC, the payment for cataract surgery is reduced by 50%. We believe that the incremental payment the ASC facility receives for performing iStent insertion in conjunction with cataract surgery over and above what the facility would receive for performing cataract surgery alone covers the cost of the iStent device and the profit for the facility. The incremental ASC facility payment has remained relatively stable over the past few years, however there is no assurance that this payment will remain stable in the future. If the incremental facility payment were to decrease such that it did not cover the cost of the iStent device, it could reduce the profit margin of the ASC where the cataract surgery is performed, make it difficult for existing customers to continue using, or new customers to adopt, our products and create additional pricing pressure for us.

Reimbursement for iStent insertion and cataract procedures performed in HOPDs was similar to ASCs until CMS implemented a rule change, effective January 1, 2016, reflecting a trend by CMS of bundling payment for procedures that are clinically similar and performed at the same time in HOPDs. Procedures covered by these combined reimbursement codes are grouped into levels and reimbursed with a single, all‑inclusive payment. As a result of this recent rule change, CMS combined the cataract and MIGS/iStent procedure within a single comprehensive reimbursement code, which eliminated the separate 50% facility reimbursement for the cataract portion of the procedure when performed in the HOPD. While this change will result in lower Medicare fee‑for‑service reimbursement when iStent and cataract procedures are performed at the same time in HOPDs, we do not expect it to have a material impact on our 2016 iStent utilization rates. We intend to preserve our current HOPD pricing on the iStent device. We estimate that approximately 25% of US iStent procedures are currently performed in HOPDs but only a portion of these procedures are reimbursed through traditional Medicare fee‑for‑service. This change will likely reduce the profit margin of the iStent and cataract procedure for some HOPD customers and could potentially make it more difficult for some existing HOPD customers to continue using, or new HOPD customers to adopt, our products and could create additional pricing pressure on the iStent implant.

Physicians are paid separately from the facility for surgical procedures. Unlike the facility payment, for the CPT code that describes iStent insertion, there is no published Medicare payment schedule at the national level, and the physician payment rate is left to the discretion of the individual Medicare contractor. In order to adopt a new procedure, one of the factors that the surgeon evaluates is whether or not payment for the procedure adequately covers the surgeon’s time. As with the facility payment, the incremental payment the physician receives for inserting the iStent device in conjunction with cataract surgery over and above what he or she would receive for performing cataract surgery alone

plays a role in a surgeon’s decision to adopt the technology. We estimate that the national average incremental payment is approximately $500.

Unlike Medicare, commercial payors do not publish fee schedules. In general, based on selected feedback from facilities and surgeons, payments for iStent insertion from the commercial payors who cover the procedure generally run somewhat higher than the comparable local Medicare payment.

Reimbursement for future products

We have also filed and received approval of applications for CPT codes that describe our pipeline iStent devices. Our application for a CPT code to describe insertion of the iStent Supra was approved by the American Medical Association, or AMA, in 2011 resulting in the creation of Category III CPT code 0253T. Our application for a CPT code to describe the insertion of additional trabecular meshwork stents (as with the iStent Inject procedure) was approved by the AMA in early 2014 resulting in the creation of Category III CPT code 0376T. While this code was available beginning on January 1, 2015, for the reporting of procedures in which more than one iStent is inserted in the same eye, it currently does not result in any incremental facility or professional fee payment from Medicare. In addition, it is unclear whether any other third‑party payor will cover the insertion of a second stent or that payment for a second stent will be adequate.

Reimbursement outside the United States

Reimbursement in Europe

In most of the developed European countries, healthcare is funded by the central government. In general, obtaining broad‑based reimbursement and adequate payment for new technologies is more difficult in these markets than in the United States. As with the United States, high‑quality published clinical data (i.e., randomized, controlled trials) is required to obtain coverage. However, most of the developed European countries require new medical technologies to not only be safe and effective, but also to be able to demonstrate clinical benefits that outweigh the costs when compared to the standard of care. Conversely, while some U.S. private insurers take cost into consideration, Medicare by law does not consider cost in its coverage decisions.

Our primary focus has been on the U.S. market and we are in the early stages of commercialization in Europe. With regard to reimbursement in the larger developed countries, we have made the most progress in Germany. Prior to 2013, surgeons in Germany who implanted the iStent used a code for a general glaucoma operation. This code was only payable in the hospital inpatient setting and, although the payment was sufficient to cover the cost of the iStent and payment to the surgeon, the requirement of an overnight stay in the hospital was a significant barrier to adoption. Effective January 1, 2013, there is a specific code (5‑133.9) describing implantation of a trabecular stent (e.g., the iStent and iStent Inject). This code was added to the Einheitlicher Bewertungsmaßstab (EBM) or Unified Rating Scale of procedures that are payable in the outpatient setting. The 5‑133.9 code can be reported in conjunction with cataract surgery or as a stand‑alone procedure. In addition, the payment to the surgeon for 5‑133.9 is considered adequate to cover the surgeon’s costs (i.e., time) for inserting the iStent. Also, under the EBM, the cost of the implant can be passed through to the payor.

Although under German law healthcare is a universal right, and approximately 90% of the population is covered under the Statutory Health Insurance (SHI) or public plan, coverage decisions and payment are decentralized. Physicians who treat SHI patients must belong to a Kassenärztliche Vereinigung (KV) or Physician’s Association. There are 17 KVs in Germany, and the KVs are responsible for negotiating the budget with the State Sickness Fund for physician and facility payments for outpatient procedures in their region. Generally, procedures that are added to the EBM are covered and paid for by the KVs; however, this is not automatic and the process of achieving routine payment for a new procedure listed on the EBM can take several months. With several KVs, an application must be made to the KV by a surgeon in that area who wishes to perform the procedure. In some cases, the addition of a new outpatient procedure can create budget issues and there can be a delay while the KV negotiates additional funds with the State Sickness Fund to cover payment for the new procedure.

Surgeons in each of the states continue to work to gain KV approval so that claims are processed smoothly. While the majority of claims submitted to KVs in 2015 were processed and paid, some were denied. We are working with reimbursement consultants in Germany who have a successful track record of securing adequate payment for new medical technologies. In light of the strong favorable clinical data for iStent, we anticipate that reimbursement will continue to improve in Germany.

Under German law, if a person has an income above a certain level, that person can opt out of the SHI and obtain private insurance. Approximately 10% of Germans have opted out and are covered by private insurance companies. Each of these private insurance companies makes its own decisions on individual claims. In general, the private insurance companies cover and pay for outpatient procedures listed on the EBM and that has been our experience to date with iStent insertion.

We have also made significant progress in reimbursement in Switzerland where the procedure that describes iStent insertion is on the list of approved outpatient procedures. This also means that the costs of any implants or supplies used during these procedures can be passed through for payment. Like Germany, coverage and payment decisions are decentralized, with 26 cantons and numerous private insurers determining coverage. To date, the vast majority of claims for iStent procedures have been processed and paid with no issues.

In France, our application for a code to describe iStent insertion and our application to add the iStent to the list of devices approved for pass through payment were denied in 2013. Following the publication of data on iStent Inject, we submitted new applications for both devices in 2014. In November 2015, the French government approved the iStent application for reimbursement. Unless there is a code and listing on the pass through list, the only opportunity for payment for the iStent in France would result from successful negotiations at the individual hospital level. There can be no assurance that the French government will approve pass through payment for iStent even though iStent has been approved for reimbursement.

In the United Kingdom, Spain and Italy, there are no codes that specifically describe the insertion of a trabecular stent. We do not anticipate this changing in Spain and Italy in the near future. In addition, there is no mechanism to provide incremental payment for the iStent when insertion is in conjunction with cataract surgery. Our success to date relies on our distributors in these countries negotiating with individual hospitals to cover the cost of inserting the iStent.  

Reimbursement in other regions

We currently market the iStent in Australia,  New Zealand and Canada. In Australia, we have been successful at including the iStent and iStent Inject on the pass through list so that the cost of the device is paid separately. In New Zealand, the vast majority of the population is covered under a publicly‑funded, universal‑coverage health system, with services provided by public, private and non‑governmental sectors. We have yet to achieve significant success with any of the public and major private payors in New Zealand. In Canada, the iStent and iStent Inject is paid through individual hospital budgets for glaucoma implants. We have yet to achieve a special funding pathway for iStent and iStent Inject in Canada and we will be subject to the limitations of individual hospital budgets until Canadian Provinces provide a special funding pathway for our products.

Although we are not yet commercial in Japan, we believe that the current reimbursement structure that would apply to iStent insertion in conjunction with cataract surgery may support adequate reimbursement to both the facility and physician.

Competition

We are positioning our products and MIGS procedures for use instead of, or in combination with, prescription eye drop therapies that currently dominate the glaucoma treatment marketplace. To a lesser extent, we also compete with manufacturers of medical devices used in other surgical therapy procedures for treating glaucoma, including laser as well as more complex and invasive surgeries.

Many of our current and future competitors are large public companies or divisions of publicly‑traded companies and have several competitive advantages, including:

Companies with competing products include Alcon, Inc., a division of Novartis International AG (which has entered into a definitive agreement to acquire Transcend Medical, Inc. (Transcend), a MIGS competitor), Abbott Medical Optics Inc., Allergan plc (which has entered into a definitive merger agreement with Pfizer, Inc., pursuant to which the two companies intend to combine), STAAR Surgical Company, Lumenis Ltd., NeoMedix,Inc. and Ellex Medical Lasers Limited. Alcon, Inc. and Abbott Medical Optics Inc. are the leading manufacturers of aqueous shunts, and Alcon, Inc. also markets the EX‑PRESS Glaucoma Filtration Device and, upon its completion of the Transcend acquisition, will be a manufacturer of a MIGS device. Lumenis Ltd. is a leading manufacturer of SLT equipment. NeoMedix, Inc. markets an electrosurgical device and Ellex Medical Lasers Limited markets a canaloplasty device that some physicians employ to lower intraocular pressure in glaucoma.

In addition to these current competitors, we may also in the future compete with manufacturers of alternative technologies to treat glaucoma. We are aware of several companies, including Transcend (which has entered into a definitive agreement to be acquired by Alcon, Inc.), AqueSys, Inc. (which was recently acquired by Allergan plc, a publicly traded company, which has entered into a definitive merger agreement with Pfizer, Inc., pursuant to which the two companies intend to combine), InnFocus Inc. and Ivantis Inc., that are conducting FDA‑approved IDE clinical trials or have filed for regulatory approval of MIGS devices. These products or other products that may be developed could demonstrate better safety or effectiveness, clinical results, ease of use or lower costs than our iStent or other products under development. If approved for marketing, these devices may compete directly with the iStent and our products under development. If any of these alternative technologies gain market acceptance, this may reduce demand for our primary product, the iStent, as well as for our products in development.

In addition to competing for market share for our products, we also compete against these companies for personnel, including qualified sales representatives that are necessary to grow our business, as well as scientific and clinical personnel from universities and research institutions that are important to our research and development efforts.

We believe the principal competitive factors in our market include:

Facilities, Manufacturing and Distribution

We occupy approximately 23,915 square feet at our corporate headquarters facilities located in Laguna Hills, California under a lease that expires on September 30, 2016. All of our headquarters‑based employees, including our manufacturing and distribution employees, work at these facilities. While these facilities are sufficient for our current needs, we will require additional space as our business expands. Accordingly, we entered into a sublease for an approximately 37,700 square foot facility located in San Clemente, California effective September 1, 2015, as well as a five‑year lease for these premises that takes effect January 1, 2017 upon expiration of the sublease. We plan for this facility to serve as our headquarters beginning sometime in 2016. Our international subsidiaries also lease facilities in Australia, Canada, Germany and Japan.

We manufacture, inspect, package and ship finished products from our Laguna Hills facility. We source components used in our proprietary manufacturing process from outside vendors and we assemble them to produce iStent devices and disposable insertion instruments. These components include both off‑the‑shelf materials and custom made parts. The iStent device and some insertion instrument components are supplied by single vendors. While we believe that there are at least several other vendors that could make any one of these items, we maintain a minimum inventory of three to six months’ supply to help mitigate any supply interruptions. We source the heparin used in our iStent heparin coating from one supplier. We maintain a stock of several years’ worth of heparin material and have FDA approval to retest and extend the shelf life of the material indefinitely for U.S. product.

We have received International Standards Organization (ISO) 13485 certification, which includes design control requirements. Our manufacturing processes have been validated as required by the FDA and other regulatory bodies. As a medical device manufacturer, our manufacturing facility and the facilities of our critical suppliers are subject to periodic inspection by the FDA and other regulatory agencies. To date, FDA and CE manufacturing audits conducted at our facilities have noted no significant deficiencies or findings requiring remediation.

We have significantly increased manufacturing output since the commercial launch of the iStent in 2012. We believe we are well‑positioned to continue advancing our manufacturing technology, capacity and efficiency going forward.

Intellectual Property

We believe that the strength of our competitive position will depend substantially upon our ability to obtain and enforce intellectual property rights protecting our technology. We file for patents for new patentable technologies relevant to our business and utilize other forms of intellectual property protection to strategically protect our intellectual property. We believe that our intellectual property portfolio can be leveraged into new products and potential additional indications for our technology. In addition, we may also review and attempt to acquire rights in third‑party patents and applications that are strategically valuable to us.

Patents

As of December 31, 2015, we owned or exclusively licensed in certain fields of use 124 issued patents, of which we owned 52 that were issued in the United States and 61 that were issued outside of the United States, and 80 pending patent applications, of which we owned 29 that were filed in the United States and 21 that were filed outside of the United States. We also granted to DOSE Medical certain exclusive rights and licenses outside our licensed fields of use under certain of our owned patents and patent applications. Our issued patents that protect our commercial products and current product pipeline will expire between 2020 and 2033. While we have pursued and continue to pursue patent protection for our technologies, we may, from time to time, abandon certain patents and patent applications for business reasons.

Our U.S. patents include a variety of claims related to devices and methods for treating glaucoma with ab‑interno surgical procedures, which are procedures initiated from within the anterior chamber of the eye and accessed

through an opening in the clear corneal tissue. Our pending U.S. patent applications, if issued with their present claims, relate to the same field and potentially other fields of use.

From March 2013 to October 2015, we were engaged in a dispute with Transcend  (which has entered into a definitive agreement to be acquired by Alcon, Inc., a division of Novartis International AG) as to whether or not Transcend’s CyPass Micro‑Stent infringed our patents. On October 29, 2015, we entered into a settlement agreement with Transcend to resolve the patent litigation then pending between us before the U.S. District Court for the District of Delaware. Under the settlement agreement, we granted Transcend a covenant not to sue Transcend for patent infringement in connection with Transcend’s CyPass Micro‑Stent devices, appliers and delivery systems. In exchange, Transcend granted us a conditional covenant not to challenge the validity or enforceability of any of our patents and will make quarterly payments to us equal to 1% of future net sales of the CyPass Micro‑Stent devices until April 8, 2022 or up to a maximum aggregate payment amount of $6.0 million. In connection with our settlement, we filed a joint stipulation of dismissal with prejudice of all of our respective claims against each other in this matter, with each of us responsible for our own legal expenses. The court dismissed the matter with prejudice on October 29, 2015, thereby eliminating the need for the trial, which was scheduled to begin on November 2, 2015. In connection with entering into the settlement agreement, we agreed to pay The Regents of The University of California (the University) 33% of any payments we receive from Transcend pursuant to the settlement agreement. For additional information relating to our agreement with the University, see “Intellectual Property—Intellectual property agreements.”

Before dismissal, the court ruled on Transcend’s motion for summary judgment on various invalidity grounds. While the court denied Transcend summary judgment on almost all grounds, the court did issue an order granting summary judgment that certain dependent claims using the term “choroid” were indefinite and invalid. Although this order did not become a final judgment due to the dismissal, there would be no guarantee that the order would not negatively affect an analysis of the validity of these claims in addition to a limited number of claims in other patents that we own covering the iStent Supra if such patents are challenged in the future.

The ophthalmology industry in which we operate has been subject to a large number of patent filings and patent infringement litigation. Whether we infringe any patent claim owned by a third party will not be known with certainty unless and until a court interprets the patent claim in the context of litigation. If an infringement allegation is made against us, we may seek to invalidate the asserted patent claim and may allege non‑infringement of the asserted patent claim. Also, for business reasons, we may take similar actions before any such infringement allegation is made. In order for us to invalidate a U.S. patent claim, we would need to rebut the presumption of validity afforded to issued patents in the United States with clear and convincing evidence of invalidity, which is a high burden of proof. Similar or greater effort and proof may be required to invalidate foreign patents owned by third parties, including those owned by our competitors.

Trademarks

Glaukos, our logo, iStent, iStent Supra, iStent Inject and iPrism are registered trademarks of our company in the United States. Glaukos, iStent, iStent Inject, iStent Supra and iDose are registered trademarks of our company in the European Union. We have registered trademarks for Glaukos in Canada, Japan and Mexico. We have registered trademarks for iStent in Australia, Canada, Chile, Japan, Mexico and Switzerland. We have pending trademark applications for iStent in Argentina, Brazil and Columbia. We have a pending trademark application for iDose TR in the United States. We have pending trademark applications for iDose in Australia, Canada, Japan and the United States. We have pending trademark applications for iPrism in Australia, Canada, Europe and Japan. We have pending trademark applications for iStent Inject in Australia, Canada and Japan. We also use MIGS as an unregistered trademark.

Trade secrets

We may rely, in some circumstances, on trade secrets to protect our technology. However, trade secrets can be difficult to protect. We seek to protect our proprietary technology and manufacturing process in part by confidentiality and invention assignment agreements with employees, under which they are bound to assign to us inventions made during the term of their employment unless excluded pursuant to California Labor Code Section 2870. These agreements further prohibit our employees from using, disclosing, or bringing onto the premises any proprietary information belonging to a third party. In addition, most of our consultants, scientific advisors and contractors are required to sign

agreements under which they must assign to us any inventions that relate to our business. These agreements also prohibit these third parties from incorporating into any inventions the proprietary rights of third parties without informing us. It is our policy to require all employees to document potential inventions and other intellectual property in laboratory notebooks and to disclose inventions to patent counsel using invention disclosure forms.

We also rely on confidentiality restrictions and trade secret protection to protect our technology. We generally require our consultants and other parties who may be exposed to our proprietary technology to sign non‑disclosure agreements that prohibit such parties from disclosing or using our proprietary information except as may be authorized by us.

We also seek to preserve the integrity and confidentiality of our data and trade secrets by maintaining physical security of our premises and physical and electronic security of our information technology systems. While we have confidence in these individuals, organizations and systems, agreements or security measures may be breached and we may not have adequate remedies for any breach. In addition, our trade secrets may otherwise become known or be independently discovered by competitors. To the extent that our consultants, contractors or collaborators use intellectual property owned by others in their work for us, disputes may arise as to the rights in related or resulting know‑how and inventions.

Intellectual property agreements

In January 2007, we entered into an agreement with GMP Vision Solutions, Inc. (GMP) to acquire certain in‑process research and development. In connection with the agreement, we agreed to make periodic royalty payments based on revenues received for royalty‑bearing products and periodic royalty payments at a higher rate for all amounts received in connection with the grant of licenses or sublicenses of the related intellectual property. In December 2012, we entered into an agreement with GMP pursuant to which we paid GMP $1.0 million for a 90‑day option to buy out all remaining royalties payable to GMP. In April 2013, the option expired unexercised and as provided in the agreement, the $1.0 million payment satisfied the obligation to pay the first $1.0 million in royalties earned beginning on January 1, 2013.

In November 2013, we entered into an agreement with GMP pursuant to which we bought out all remaining royalties payable to GMP in exchange for the issuance of $17.5 million in promissory notes payable to GMP and a party related to GMP. For additional information relating to the terms of these notes, see “Management’s Discussion and Analysis of Financial Condition and Results of Operations—Liquidity and Capital Resources—Indebtedness.”

In December 2014, we entered into an agreement with the University to quiet title to our entire ownership of certain patents and patent applications, or the Patent Rights, to which Dr. Richard Hill contributed while he was both a consultant for us and a faculty member at the University. In connection with the agreement, we agreed to pay to the University $2.7 million in 2015 and to make periodic payments to the University equal to a low single‑digit percentage of worldwide net sales, beginning in 2015, of certain current and future products, including our iStent products, with a required minimum annual payment of $500,000 during the term of the agreement. The University has a security interest in all tangible assets owned by us. Our agreement with the University will expire upon the expiration of the last to expire of the Patent Rights, which is currently expected to be in 2022.

On October 29, 2015, we entered into the settlement agreement with Transcend (which has entered into a definitive agreement to be acquired by Alcon, Inc., a division of Novartis International AG, which is a publicly traded multinational pharmaceutical company based in Basel, Switzerland) whereby we granted Transcend a covenant not to sue for patent infringement in connection with certain Transcend products and released Transcend from any and all liability for past infringement of our patents. Transcend granted us a conditional covenant not to challenge the validity or enforceability of any of our patents, and agreed to make royalty payments equal to 1% of future net sales of certain Transcend products in countries where we have patent protection. Transcend’s royalty obligation continues until April 8, 2022, or up to a maximum aggregate payment amount of $6.0 million, whichever occurs first. In connection with entering into the settlement agreement, we agreed to pay the University 33% of any payments we receive from Transcend pursuant to the settlement agreement.

Government Regulation

Our products and operations are subject to extensive and rigorous regulation by the FDA and other federal, state and local authorities, as well as foreign regulatory authorities. The FDA regulates, among other things, the research, development, testing, manufacturing, approval, labeling, storage, recordkeeping, advertising, promotion and marketing, distribution, post approval monitoring and reporting and import and export of medical devices (such as iStent), as well as combination drug/device products (such as iDose) in the United States to assure the safety and effectiveness of medical products for their intended use. The Federal Trade Commission also regulates the advertising of our products. Further, we are subject to laws directed at preventing fraud and abuse, which subject our sales and marketing, training and other practices to government scrutiny.

U.S. government regulation—medical devices

Unless an exemption applies, each new or significantly modified medical device we seek to commercially distribute in the United States will require either a premarket notification to the FDA requesting permission for commercial distribution under Section 510(k) of the Federal Food, Drug and Cosmetic Act (FDCA) also referred to as a 510(k) clearance, or approval from the FDA of a PMA application. Both the 510(k) clearance and PMA processes can be expensive, and lengthy, and require payment of significant user fees, unless an exemption is available.

Device classification

Under the FDCA, medical devices are classified into one of three classes—Class I, Class II or Class III—depending on the degree of risk associated with each medical device and the extent of control needed to provide reasonable assurances with respect to safety and effectiveness.

Class I devices are those for which safety and effectiveness can be reasonably assured by adherence to a set of regulations, referred to as General Controls, which require compliance with the applicable portions of the FDA’s Quality System Regulation (QSR), facility registration and product listing, reporting of adverse events and malfunctions, and appropriate, truthful and non‑misleading labeling and promotional materials. Some Class I devices, also called Class I reserved devices, also require premarket clearance by the FDA through the 510(k) premarket notification process described below. Most Class I products are exempt from the premarket notification requirements.

Class II devices are those that are subject to the General Controls, as well as Special Controls, which can include performance standards, guidelines and postmarket surveillance. Most Class II devices are subject to premarket review and clearance by the FDA. Premarket review and clearance by the FDA for Class II devices is accomplished through the 510(k) premarket notification process. Under the 510(k) process, the manufacturer must submit to the FDA a premarket notification, demonstrating that the device is “substantially equivalent,” as defined in the statute, to either:

To be “substantially equivalent,” the proposed device must have the same intended use as the predicate device, and either have the same technological characteristics as the predicate device or have different technological characteristics and not raise different questions of safety or effectiveness than the predicate device. Clinical data is sometimes required to support substantial equivalence.

After a 510(k) notice is submitted, the FDA determines whether to accept it for substantive review. If it lacks necessary information for substantive review, the FDA will refuse to accept the 510(k) notification. If it is accepted for filing, the FDA begins a substantive review. By statute, the FDA is required to complete its review of a 510(k) notification within 90 days of receiving the 510(k) notification. As a practical matter, clearance often takes longer, and clearance is never assured. Although many 510(k) premarket notifications are cleared without clinical data, the FDA may require further information, including clinical data, to make a determination regarding substantial equivalence, which

may significantly prolong the review process. If the FDA agrees that the device is substantially equivalent, it will grant clearance to commercially market the device.

After a device receives 510(k) clearance, any modification that could significantly affect its safety or effectiveness, or that would constitute a new or major change in its intended use, will require a new 510(k) clearance or, depending on the modification, could require a PMA application. The FDA requires each manufacturer to make this determination initially, but the FDA can review any such decision and can disagree with a manufacturer’s determination. If the FDA disagrees with a manufacturer’s determination regarding whether a new premarket submission is required for the modification of an existing device, the FDA can require the manufacturer to cease marketing and/or recall the modified device until 510(k) clearance or approval of a PMA application is obtained. If the FDA requires us to seek 510(k) clearance or approval of a PMA application for any modifications to a previously cleared product, we may be required to cease marketing or recall the modified device until we obtain this clearance or approval. In addition, in these circumstances, we may be subject to significant regulatory fines or penalties for failure to submit the requisite PMA application(s). In addition, the FDA is currently evaluating the 510(k) process and may make substantial changes to industry requirements.

If the FDA determines that the device is not “substantially equivalent” to a predicate device, or if the device is automatically classified into Class III, the device sponsor must then fulfill the much more rigorous premarketing requirements of the PMA approval process, or seek reclassification of the device through the de novo process. Pursuant to amendments to the statute in 2012, a manufacturer can also submit a petition for direct de novo review if the manufacturer is unable to identify an appropriate predicate device and the new device or new use of the device presents a moderate or low risk.

Class III devices include devices deemed by the FDA to pose the greatest risk such as life‑supporting or life‑sustaining devices, or implantable devices, in addition to those deemed not substantially equivalent following the 510(k) process. The safety and effectiveness of Class III devices cannot be reasonably assured solely by the General Controls and Special Controls described above. Therefore, these devices are subject to the PMA application process, which is generally more costly and time consuming than the 510(k) process. Through the PMA application process, the applicant must submit data and information demonstrating reasonable assurance of the safety and effectiveness of the device for its intended use to the FDA’s satisfaction. Accordingly, a PMA application typically includes, but is not limited to, extensive technical information regarding device design and development, pre‑clinical and clinical trial data, manufacturing information, labeling and financial disclosure information for the clinical investigators in device studies. The PMA application must provide valid scientific evidence that demonstrates to the FDA’s satisfaction reasonable assurance of the safety and effectiveness of the device for its intended use.

The investigational device process

In the United States, absent certain limited exceptions, human clinical trials intended to support medical device clearance or approval require an IDE application. Some types of studies deemed to present “non‑significant risk” are deemed to have an approved IDE once certain requirements are addressed and Institutional Review Board (IRB) approval is obtained. If the device presents a “significant risk” to human health, as defined by the FDA, the sponsor must submit an IDE application to the FDA and obtain IDE approval prior to commencing the human clinical trials. The IDE application must be supported by appropriate data, such as animal and laboratory testing results, showing that it is safe to test the device in humans and that the testing protocol is scientifically sound. The IDE application must be approved in advance by the FDA for a specified number of subjects. Generally, clinical trials for a significant risk device may begin once the IDE application is approved by the FDA and the study protocol and informed consent are approved by appropriate institutional review boards at the clinical trial sites. There can be no assurance that submission of an IDE will result in the ability to commence clinical trials, and although the FDA’s approval of an IDE allows clinical testing to go forward for a specified number of subjects, it does not bind the FDA to accept the results of the trial as sufficient to prove the product’s safety and efficacy, even if the trial meets its intended success criteria.

All clinical trials must be conducted in accordance with the FDA’s IDE regulations that govern investigational device labeling, prohibit promotion and specify an array of recordkeeping, reporting and monitoring responsibilities of study sponsors and study investigators. Clinical trials must further comply with the FDA’s regulations for institutional review board approval and for informed consent and other human subject protections. Required records and reports are subject to inspection by the FDA. The results of clinical testing may be unfavorable, or, even if the intended safety and

efficacy success criteria are achieved, may not be considered sufficient for the FDA to grant marketing approval or clearance of a product. The commencement or completion of any clinical trial may be delayed or halted, or be inadequate to support approval of a PMA application, for numerous reasons, including, but not limited to, the following:

The PMA approval process

Following receipt of a PMA application, the FDA conducts an administrative review to determine whether the application is sufficiently complete to permit a substantive review. If it is not, the agency will refuse to file the PMA. If it is, the FDA will accept the application for filing and begin the review. The FDA, by statute and by regulation, has 180 days to review a filed PMA application, although the review of an application more often occurs over a significantly longer period of time. During this review period, the FDA may request additional information or clarification of information already provided, and the FDA may issue a major deficiency letter to the applicant, requesting the applicant’s response to deficiencies communicated by the FDA. The FDA considers a PMA or PMA supplement to have been voluntarily withdrawn if an applicant fails to respond to an FDA request for information (e.g., major deficiency letter) within a total of 360 days. Before approving or denying a PMA, an FDA advisory committee may review the PMA at a public meeting and provide the FDA with the committee’s recommendation on whether the FDA should approve the submission, approve it with specific conditions, or not approve it. Prior to approval of a PMA, the FDA may conduct a bioresearch monitoring inspection of the clinical trial data and clinical trial sites, and a QSR inspection of the manufacturing facility and processes. Overall, the FDA review of a PMA application generally takes between one and

three years, but may take significantly longer. The FDA can delay, limit or deny approval of a PMA application for many reasons, including:

If the FDA evaluation of a PMA is favorable, the FDA will issue either an approval letter, or an approvable letter, which usually contains a number of conditions that must be met in order to secure final approval of the PMA. When and if those conditions have been fulfilled to the satisfaction of the FDA, the agency will issue a PMA approval letter authorizing commercial marketing of the device, subject to the conditions of approval and the limitations established in the approval letter. If the FDA’s evaluation of a PMA application or manufacturing facilities is not favorable, the FDA will deny approval of the PMA or issue a not approvable letter. The FDA also may determine that additional tests or clinical trials are necessary, in which case the PMA approval may be delayed for several months or years while the trials are conducted and data is submitted in an amendment to the PMA, or the PMA is withdrawn and resubmitted when the data are available. The PMA process can be expensive, uncertain and lengthy and a number of devices for which FDA approval has been sought by other companies have never been approved by the FDA for marketing.

New PMA applications or PMA supplements may be required for modification to the manufacturing process, labeling, device specifications, materials or design of a device that has been approved through the PMA process. PMA supplements often require submission of the same type of information as an initial PMA application, except that the supplement is limited to information needed to support any changes from the device covered by the approved PMA application and may or may not require as extensive technical or clinical data or the convening of an advisory panel, depending on the nature of the proposed change.

In approving a PMA application, the FDA may also require some form of postmarket studies or postmarket surveillance, whereby the applicant follows certain patient groups for a number of years and makes periodic reports to the FDA on the clinical status of those patients when necessary to protect the public health or to provide additional safety and effectiveness data for the device. FDA may also require postmarket surveillance for certain devices cleared under a 510(k) notification, such as implants or life‑supporting or life‑sustaining devices used outside a device user facility. The FDA may also approve a PMA application with other post‑approval conditions intended to ensure the safety and effectiveness of the device, such as, among other things, restrictions on labeling, promotion, sale, distribution and use.

Because of the indication we chose to pursue for the iStent in the United States, the FDA required that we undergo the more rigorous PMA process. The majority of the devices currently marketed in the United States for the treatment of glaucoma have been cleared via the 510(k) process. The FDA considered the iStent to be a “first in class” device that was not substantially equivalent to any currently marketed device.

The FDA approved the iStent PMA on June 25, 2012, for the indication for use in combination with cataract surgery for the reduction of intraocular pressure in adult patients with mild‑to‑moderate open‑ angle glaucoma currently treated with prescription eye drops. The FDA imposed conditions of approval, including three postmarket studies, and a requirement that we implement a three‑part training program for physicians who will use the iStent device.

We are required to file new PMA applications or PMA supplement applications for significant modifications to the manufacturing process, labeling and design of a device for which we have received approval through the PMA approval process.

Post‑approval requirements

After the FDA permits a device to enter commercial distribution, numerous regulatory requirements apply. These include, but are not limited to:

Our facilities, records and manufacturing processes are subject to periodic unscheduled inspections by the FDA. Failure to comply with the applicable United States medical device regulatory requirements could result in, among other things, warning letters, untitled letters, fines, injunctions, consent decrees, civil penalties, unanticipated expenditures, repairs, replacements, refunds, recalls or seizures of products, operating restrictions, total or partial suspension of production, the FDA’s refusal to issue certificates to foreign governments needed to export products for sale in other countries, the FDA’s refusal to grant future premarket clearances or approvals, withdrawals or suspensions of current product clearances or approvals and criminal prosecution.

U.S. government regulation—drug delivery implant

In the United States, the FDA regulates drugs and combination drug/device products under the FDCA and related regulations. Drugs are also subject to other federal, state and local statutes and regulations, which along with the FDCA govern, among other things, the research, development, testing, manufacture, storage, recordkeeping, approval, labeling, advertising, promotion and marketing, distribution, post‑approval monitoring and reporting, and import and export of pharmaceutical products. Failure to comply with the applicable U.S. regulatory requirements at any time during the drug product development process, approval process or post‑approval, may subject an applicant to administrative or judicial sanctions, including refusal by the FDA to approve pending applications, withdrawal of an approval, imposition of a clinical hold, issuance of warning letters and other types of letters, product recalls, product seizures, total or partial suspension of production or distribution, injunctions, fines, refusals of government contracts, restitution, disgorgement of

profits, or civil or criminal investigations and penalties brought by FDA and the Department of Justice, or other governmental entities. Any agency or judicial enforcement action could have a material adverse effect on us.

The steps required before a drug may be approved for marketing in the United States generally include:

The investigational new drug process

An IND application is a request for authorization from the FDA to administer an investigational drug to humans. Such authorization must be obtained prior to administration to humans of any new drug or dosage form, including a new use of a previously approved drug, that is not the subject of an approved new drug application, or NDA, except under limited circumstances.

To conduct a clinical study of an investigational new drug product, we are required to file an IND with the FDA. The IND submission must include the general investigational plan and the protocol(s) for human studies, as well as results of animal studies or other human studies, as appropriate, analytical data and any available clinical data or literature to support the use of the investigational new drug. An IND must become effective before human clinical trials may begin. An IND will automatically become effective 30 days after receipt by the FDA, unless before that time the FDA raises concerns or questions related to the proposed clinical trials as outlined in the IND. If FDA raises questions, the IND may be placed on clinical hold and the IND sponsor and the FDA must resolve any outstanding concerns or questions before clinical trials can begin. Accordingly, submission of an IND may or may not result in the FDA allowing clinical trials to begin. A separate submission to an existing IND application must also be made for each successive clinical trial conducted during product development.

Clinical trials involve the administration of the investigational drug to patients under the supervision of qualified investigators in accordance with GCPs. Clinical trials are conducted under protocols detailing, among other things, the objectives of the study, the parameters to be used in monitoring safety, and the efficacy criteria to be evaluated. A protocol for each clinical trial and any subsequent protocol amendments must be submitted to the FDA as part of the IND. Additionally, approval must also be obtained from the IRB at each clinical site before the trials may be initiated. The IRB will consider, among other things, ethical factors, the safety of human subjects and the possible liability of the institution. The IRB must also monitor the trial until completed. All participants in our clinical trials must provide their informed consent in writing. In addition, there are requirements and industry guidelines that require the posting of ongoing clinical trials on public registries, and the disclosure of designated clinical trial results. The IRB must also review and approve all clinical trial recruitment plans and materials.

The clinical investigation of an investigational drug product is generally divided into three phases. Although the phases are usually conducted sequentially, they may overlap or be combined. The three phases of investigational new drug investigation are as follows:

The FDA’s primary objectives in reviewing an IND are to assure the safety and rights of patients and to help assure that the quality of the investigation will be adequate to permit an evaluation of the drug’s effectiveness and safety. The decision to terminate development of an investigational drug product may be made by either the FDA, an IRB or ethics committee, or by the study sponsor for various reasons. Clinical trials may be overseen by an independent group of qualified experts organized by the trial sponsor, known as a data safety monitoring board or committee. This group provides authorization for whether or not a trial may move forward at designated check points based on access that only the group maintains to available data from the study. Suspension or termination of development during any phase of clinical trials can occur if it is determined that the participants or patients are being exposed to an unacceptable risk to health. Other reasons for suspension or termination may include changes in business objectives or the economic environment.

The NDA approval process

In order to obtain approval to market a drug product in the United States, a marketing application must be submitted to the FDA that includes data to establish the safety and effectiveness of the new drug product for the proposed indication. The NDA includes all relevant data available from pertinent preclinical and clinical trials, including negative or ambiguous results as well as positive findings, together with detailed information relating to the product’s chemistry, manufacturing, controls and proposed labeling, among other things. The NDA filing must also be accompanied by a substantial user fee, although there may be some instances in which the user fee is waived.

The FDA has 60 days from its receipt of an NDA to determine whether the application will be accepted for filing based on the agency’s threshold determination that it is sufficiently complete to permit substantive review. The FDA has substantial discretion in the approval process and may refuse to accept any application or decide that the data is insufficient for approval and require additional preclinical, clinical or other studies. If the FDA requests additional information rather than accept an NDA for filing, the NDA must be resubmitted with the additional information and is subject to payment of additional user fees. The resubmitted application is also subject to review before the FDA accepts it for filing.

Once the NDA has been accepted for filing, the FDA begins an in‑depth substantive review and sets a Prescription Drug User Fee Act date that informs the applicant of the specific date by which the FDA intends to complete its review. The FDA has agreed to certain performance goals in the review of NDAs through a two‑tiered classification system, Standard Review and Priority Review. Priority Review designation is given to drugs that offer major advances in treatment, or provide a treatment where no adequate therapy exists. The FDA endeavors to review applications subject to Standard Review within 10 to 12 months, whereas the FDA’s goal is to review Priority Review applications within six to eight months, depending on whether the drug is a new molecular entity. The review process is often extended by FDA requests for additional information or clarification. The FDA reviews NDAs to determine, among other things, whether the proposed product is safe and effective for its intended use, and whether the product is being manufactured in accordance with cGMP to assure and preserve the product’s identity, strength, quality and purity. Before approving an NDA, the FDA will review the proposed product labeling and may request changes. FDA will also inspect the facilities at which the product is manufactured. The FDA will not approve the product unless it determines that the manufacturing processes and facilities are in compliance with cGMP requirements and adequate to assure consistent production of the product within required specifications. In addition, before approving an NDA, the FDA will typically inspect one or more clinical sites to assure compliance with GCP. If the FDA determines the application, manufacturing process or manufacturing facilities are not acceptable, it will communicate the deficiencies to the applicant and often will request additional testing or information. Even with the submission of additional information, the FDA ultimately may decide that the application does not satisfy the regulatory standards for approval.

After the FDA evaluates the NDA and the manufacturing facilities, it issues either an approval letter or a complete response letter to indicate that the review cycle for an application is complete and that the application is not ready for approval. A complete response letter generally outlines the deficiencies in the submission and may require substantial additional testing, or information, in order for the FDA to reconsider the application. Even with submission of this additional information, the FDA may ultimately decide that an application does not satisfy the regulatory criteria for approval. If, or when, the deficiencies have been addressed to the FDA’s satisfaction in a resubmission of the NDA, the FDA will issue an approval letter. An approval letter authorizes commercial marketing of the drug with specific prescribing information for specific indications.

The clinical testing and drug approval process requires substantial time, effort and financial resources, and each may take several years to complete. Data obtained from clinical activities are not always conclusive and may be susceptible to varying interpretations, which could delay, limit or prevent regulatory approval. The FDA may not grant approval on a timely basis, or at all. Even if the FDA approves a product, the agency may limit the approved indications for use, impose prominent warnings, or place other conditions on approval that could restrict the commercial application of the products, such as special risk management measures through a Risk Evaluation and Mitigation Strategy. After approval, some types of changes to the approved product, such as adding new indications, manufacturing changes and additional labeling claims, are subject to further testing requirements and FDA review and approval.

Section 505 of the FDCA describes three types of new drug applications: (1) an application that contains full reports of investigations of safety and effectiveness (section 505(b)(1)); (2) an application that contains full reports of investigations of safety and effectiveness but where at least some of the information required for approval comes from studies not conducted by or for the applicant and for which the applicant has not obtained a right of reference (section 505(b)(2)); and (3) an application that contains information to show that the proposed product is identical in active ingredient, dosage form, strength, route of administration, labeling, quality, performance characteristics, and intended use, among other things, to a previously approved product (section 505(j)).

Our iDose implant may be eligible for the Section 505(b)(2) application pathway if and when we are prepared to submit an application for marketing to the FDA. Section 505(b)(2) expressly permits the FDA to rely, in approving a new drug application, on data not developed by the applicant. Thus, if a 505(b)(2) applicant can establish that reliance on

the FDA’s previous findings of safety and effectiveness is scientifically appropriate, it may eliminate the need to conduct certain preclinical or clinical studies of the new product. We are pursuing a Section 505(b)(2) NDA regulatory strategy for our iDose implant, which we expect will allow us to rely in our NDA filing on certain nonclinical and clinical safety findings made by the FDA in previous approvals. For changes to a previously approved drug product, an application may rely on the FDA’s finding of safety and effectiveness of the previously approved drug, coupled with the information needed to support the change from the approved drug product. The additional information could be new studies conducted by the applicant or published data. The FDA may approve the new product candidate for all, or some, of the label indications for which the reference drug has been approved, as well as for any new indication sought by the 505(b)(2) applicant.

The filing or approval of a Section 505(b)(2) application may be delayed due to patent or exclusivity protections covering an approved product. Section 505(b)(2) applications must include patent certifications and must provide notice of certain patent certifications to the NDA holder and patent owner. A Section 505(b)(2) application may be granted three years of market exclusivity if one or more of the clinical investigations, other than bioavailability/bioequivalence studies, was essential to approval of the application and was conducted or sponsored by the applicant.

Circumstances could change that may cause a Section 505(b)(2) application for our product to no longer be an appropriate pathway. For example, if an equivalent drug product were approved before our application is submitted, the applicable pathway for our drug product might be an Abbreviated New Drug Application (ANDA). An ANDA seeks approval of a drug product that has the same active ingredient(s), dosage form, strength, route of administration, and conditions of use (labeling) as a so‑called “reference listed drug” approved under an NDA with full supporting data to establish safety and effectiveness. Limited exceptions exist to this ANDA sameness requirement, including certain limited variations approved by the FDA through a special petition process. An ANDA must contain certifications relating to patents for the reference listed drug. An ANDA also generally contains limited clinical data to demonstrate that the product covered by the ANDA is absorbed in the body at the same rate and to the same extent as the reference listed drug, which is known as bioequivalence. In addition, the ANDA must contain information regarding the manufacturing processes and facilities that will be used to ensure product quality, and must contain certifications to patents listed with the FDA for the reference listed drug.

Post‑approval regulation

After regulatory approval of a drug or combination drug/device product is obtained under an NDA, we are required to comply with pervasive and continuing regulation by the FDA, including, among other things, requirements relating to drug listing and registration, recordkeeping, periodic reporting, product sampling and distribution, advertising, marketing and promotion and reporting of adverse experiences with the product. For example, as a condition of approval of an NDA, the FDA may require post‑marketing testing, including Phase IV clinical trials, and surveillance to further assess and monitor the product’s safety and effectiveness after commercialization. In addition, the holder of an approved NDA would be required to report, among other things, certain adverse events and production problems to the FDA, and to provide updated safety and efficacy information to the FDA. Drugs may be marketed only for the approved indications and in accordance with the provisions of the approved label, and even if the FDA approves a product, it may limit the approved indications for use for the product or impose other conditions, including labeling or distribution restrictions or other risk‑management mechanisms. For a combination drug/device product, such as our iDose implant, certain device reporting requirements might also apply, such as MDR requirements and reports of corrections and removal.

Quality control and manufacturing procedures must continue to conform to cGMP after approval. In addition, medical device quality system regulations would apply to the device component of a combination drug/device product, either all the QSR regulations or particular QSR regulations supplementing the drug cGMP in accordance with FDA regulations in 21 C.F.R. Part 4. The FDA periodically inspects manufacturing facilities to assess compliance with cGMP and QSR. In addition, changes to the manufacturing process are strictly regulated, and, depending on the significance of the change, may require prior FDA approval before being implemented. FDA regulations also require investigation and correction of any deviations from cGMP or QSR and impose reporting and documentation requirements upon us and any third‑party manufacturers that we may decide to use. Accordingly, manufacturers must continue to expend time, money and effort in the area of production and quality control to maintain compliance with cGMP, QSR, and other aspects of regulatory compliance.

After approval, most changes to the approved product, such as adding new indications or other labeling claims, as well as some manufacturing and supplier changes, are subject to prior FDA review and approval of a new NDA or an NDA supplement. An NDA supplement for a new indication typically requires clinical data similar to that in the original application, and the FDA uses the similar procedures in reviewing NDA supplements as it does in reviewing NDAs. The manufacturer and/or sponsor under an approved NDA are also subject to annual product and establishment user fees, as well as new application fees for certain supplemental applications.

Discovery of previously unknown problems with a product or the failure to comply with applicable requirements may result in restrictions on a product, manufacturer or holder of an approved NDA, including withdrawal or recall of the product from the market or other voluntary, FDA‑initiated or judicial action that could delay or prohibit further marketing. Other potential consequences include, among other things:

Newly discovered or developed safety or effectiveness data may require changes to a product’s approved labeling, including the addition of new warnings and contraindications, and also may require the implementation of other risk management measures. In addition, the FDA strictly regulates marketing, labeling, advertising and promotion of products that are placed on the market. Drugs may be promoted only for the approved indications and in accordance with the provisions of the approved label. The FDA and other agencies actively enforce the laws and regulations prohibiting the promotion of off‑label uses, and a company that is found to have improperly promoted off‑label uses may be subject to significant liability.

New government requirements, including those resulting from new legislation, may be established, or the FDA’s policies may change, which could delay or prevent regulatory approval of our products under development and/or could significantly impact the requirements imposed on us after approval.

Available special regulatory procedures

Formal meetings

In the United States, there are different types of official meetings that may occur between us and the FDA. Each meeting type is subject to different procedures. Conclusions and agreements from each of these meetings are captured in the official final meeting minutes issued by the FDA.

Advice from the FDA is typically provided based on questions concerning quality (chemistry, manufacturing and controls testing), pre‑clinical testing and clinical studies, and pharmacovigilance plans and risk‑ management programs. Advice is not legally binding with regard to any future marketing application for the drug product.

To obtain binding commitments from the FDA on the design and size of clinical trials intended to form the primary basis of an effectiveness claim for a new drug product, Special Protocol Assessment (SPA) procedures are available. Where the FDA agrees to an SPA, the agreement may not be changed by either the sponsor or the FDA except if the sponsor and the FDA agree to a change, or a senior FDA official determines that a substantial scientific issue essential to determining the safety or effectiveness of the product was identified after the testing began. An SPA is not binding if new circumstances arise, and there is no guarantee that a study will ultimately be adequate to support an approval even if the study is conducted according to the terms of an SPA.

Pediatric development

In the United States, the FDCA provides for an additional six months of marketing exclusivity for a drug if reports are filed of investigations studying the use of the drug product in a pediatric population in response to a written request from the FDA.

In addition, NDAs must contain data (or a proposal for post‑marketing activity) to assess the safety and effectiveness of an investigational drug product for the claimed indications in all relevant pediatric populations in order to support dosing and administration for each pediatric subpopulation for which the drug is safe and effective. The FDA may, on its own initiative or at the request of the applicant, grant deferrals for submission of some or all pediatric data until after approval of the product for use in adults or full or partial waivers if certain criteria are met. Discussions about pediatric development plans can be discussed with the FDA at any time, but usually occur any time between the end‑of‑Phase II meeting and submission of the NDA.

Priority review or standard review

Based on results of Phase III clinical trials, an NDA may receive priority or standard review from the FDA. Priority review is given where preliminary estimates indicate that a product, if approved, would provide a significant improvement in safety or effectiveness of the treatment, diagnosis or prevention of a serious condition. Effective October 1, 2012, where an application receives priority review, the target date for FDA action will be eight months from submission in the case of an application for a new chemical entity and six months from submission in the case of products that do not contain a new chemical entity. Where an application receives standard review, the target date for FDA action will be 12 months from submission in the case of an application for a new chemical entity and 10 months from submission in the case of products that do not contain a new chemical entity.

Other healthcare laws

We are also subject to healthcare regulation and enforcement by the federal government and the states and foreign governments in which we conduct our business. These laws include, without limitation, state and federal anti‑kickback, fraud and abuse, false claims, and physician sunshine laws and regulations.

The federal Anti‑Kickback Statute prohibits, among other things, the offer, receipt, or payment of remuneration in exchange for or to induce the referral of patients or the use of products or services that would be paid for in whole or part by Medicare, Medicaid or other federal healthcare programs. Remuneration has been broadly defined to include anything of value, including cash, improper discounts, and free or reduced price items and services. The government has enforced the Anti‑Kickback Statute to reach large settlements with healthcare companies based on sham research or consulting and other financial arrangements with physicians. Further, a person or entity no longer needs to have actual knowledge of the statute or specific intent to violate it. In addition, the government may assert that a claim including items or services resulting from a violation of the federal Anti‑Kickback Statute constitutes a false or fraudulent claim for purposes of the federal False Claims Act (FCA). Many states have similar laws that apply to their state healthcare programs as well as private payors. Violations of the Anti‑Kickback Statute can result in exclusion from federal healthcare programs and substantial civil and criminal penalties.

The FCA imposes liability on persons who, among other things, present or cause to be presented false or fraudulent claims for payment by a federal healthcare program. The FCA has been used to prosecute persons submitting claims for payment that are inaccurate or fraudulent, that are for services not provided as claimed, or for services that are not medically necessary. Manufacturers can be held liable under these laws if they are deemed to “cause” the submission of false or fraudulent claims by, for example, providing inaccurate billing or coding information to customers or promoting a product off‑label. Actions under the FCA may be brought by the Attorney General or as a qui tam action by a private individual in the name of the government. Violations of the FCA can result in significant monetary penalties and treble damages. The federal government is using the FCA, and the accompanying threat of significant liability, in its investigation and prosecution of device companies throughout the country, for example, in connection with the promotion of products for unapproved uses and other improper sales and marketing practices. The government has obtained multi‑million and multi‑billion dollar settlements under the FCA in addition to individual criminal convictions under applicable criminal statutes. In addition, companies have been forced to implement extensive corrective action

plans, and have often become subject to consent decrees or corporate integrity agreements, severely restricting the manner in which they conduct their business. Given the significant size of actual and potential settlements, it is expected that the government will continue to devote substantial resources to investigating healthcare providers’ and manufacturers’ compliance with applicable fraud and abuse laws. If our marketing, clinical trial recruitment, research or other arrangements, including consulting arrangements with physicians, were determined to violate anti‑kickback or related laws, including the FCA, then our revenues could be adversely affected, which would likely harm our business, financial condition, and results of operations.

In addition, there has been a trend of increased federal and state regulation of payments made to physicians and other healthcare providers. The PPACA, among other things, imposed new reporting requirements on certain device manufacturers for payments made by them to physicians and teaching hospitals, as well as certain ownership and investment interests held by physicians and their immediate family members. Failure to submit required information may result in civil monetary penalties of up to an aggregate of $150,000 per year (and up to an aggregate of $1 million per year for “knowing failures”), for all payments, transfers of value or ownership or investment interests that are not timely, accurately and completely reported in an annual submission. Device manufacturers were required to begin collecting data on August 1, 2013 and submit reports on aggregate payment data to the government for the first reporting period (August 1, 2013—December 31, 2013) by March 31, 2014, and were required to report detailed payment data for the first reporting period and submit legal attestation to the accuracy of such data by June 30, 2014. Thereafter, device manufacturers must submit reports by the 90th day of each subsequent calendar year. Certain states also mandate implementation of commercial compliance programs and/or require the tracking and reporting of gifts, compensation and other remuneration to physicians.

The shifting commercial compliance environment and the need to build and maintain robust systems to comply with different compliance and/or reporting requirements in multiple jurisdictions increase the possibility that a healthcare company may violate one or more of the requirements. If our operations are found to be in violation of any of such laws or any other governmental regulations that apply to us, we may be subject to penalties, including, without limitation, civil and criminal penalties, damages, fines, the curtailment or restructuring of our operations, exclusion from participation in federal and state healthcare programs and imprisonment, any of which could adversely affect our ability to operate our business and our financial results.

Regulation outside the United States

In addition to regulations in the United States, we are subject to a variety of regulations in other jurisdictions governing clinical trials and commercial sales and distribution of our products. Whether or not we obtain FDA approval for a product, we must obtain authorization before commencing clinical trials or obtain marketing authorization or approval of a product under the comparable regulatory authorities of countries outside the United States before we can commence clinical trials or marketing of the product in those countries. The approval process varies from country to country and the time may be longer or shorter than that required for FDA approval. The requirements governing the conduct of clinical trials, product licensing, pricing and reimbursement vary greatly from country to country.

In the European Economic Area (EEA) our iStent product is regulated as a medical device. Where a medical device is intended to administer a drug, the medical device will ordinarily be regulated as a medical device, while the medicinal product will be separately regulated as a medicinal product. However, when a drug‑device combination product, such as iDose, is placed on the market as a single integral product that is intended exclusively for use in the given combination and that is not reusable, the entire product will be regulated as a medicinal product, although the device component will still need to comply with the so‑called essential requirements applicable to medical devices.

Regulation of medical devices in the EEA

There is currently no premarket government review of medical devices in the EEA unless the device also contains a medicine or a blood derivative. However, all medical devices placed on the market in the EEA must meet the relevant essential requirements laid down in Annex I to Directive 93/42/EEC concerning medical devices, or the Medical Devices Directive. The most fundamental essential requirement is that a medical device must be designed and manufactured in such a way that it will not compromise the clinical condition or safety of patients, or the safety and health of users and others. In addition, the device must achieve the performances intended by the manufacturer and be designed, manufactured and packaged in a suitable manner. The European Commission has adopted various standards

applicable to medical devices. These include standards governing common requirements, such as sterilization and safety of medical electrical equipment, and product standards for certain types of medical devices. There are also harmonized standards relating to design and manufacture. While not mandatory, compliance with these standards is viewed as the easiest way to satisfy the essential requirements as a practical matter. Compliance with a standard developed to implement an essential requirement also creates a rebuttable presumption that the device satisfies that essential requirement.

To demonstrate compliance with the essential requirements laid down in Annex I to the Medical Devices Directive, medical device manufacturers must undergo a conformity assessment procedure, which varies according to the type of medical device and its classification. Manufacturers usually have some flexibility to select conformity assessment procedures for a particular class of device and to reflect their circumstances, such as the likelihood that the manufacturer will make frequent modifications to its products. Conformity assessment procedures require an assessment of available clinical evidence, literature data for the product and post‑market experience in respect of similar products already marketed. Except for low‑risk medical devices, where the manufacturer can self‑declare the conformity of its products with the essential requirements, a conformity assessment procedure requires the intervention of a notified body. Notified bodies are often private entities and are authorized or licensed to perform such assessments by government authorities. The notified body would typically audit and examine products’ technical dossiers and the manufacturers’ quality system. If satisfied that the relevant product conforms to the relevant essential requirements, the notified body issues a certificate of conformity, which the manufacturer uses as a basis for its own declaration of conformity. The manufacturer may then apply the CE mark to the device, which allows the device to be placed on the market throughout the EEA. Once the product has been placed on the market in the EEA, the manufacturer must comply with requirements for reporting incidents and field safety corrective actions associated with the medical device.

In order to demonstrate safety and efficacy for their medical devices, manufacturers must conduct clinical investigations in accordance with the requirements of Annex X to the Medical Devices Directive and applicable European and ISO standards, as implemented or adopted in the EEA member states. Clinical trials for medical devices usually require the approval of an ethics review board and approval by or notification to the national regulatory authorities. Both regulators and ethics committees also require the submission of adverse event reports during a study and may request a copy of the final study report.

In September 2012, the European Commission adopted a Proposal for a Regulation of the European Parliament and of the Council on medical devices that will, if adopted, replace the existing Medical Devices Directive. After protracted negotiations, the proposal has now entered a so‑called trilogue procedure involving the European Parliament, Commission and Council, in which all parties will seek to agree to a compromise position. If adopted, the Regulation is expected to enter into force sometime in 2016 and become applicable three years thereafter. In its current form it would, among other things, impose additional reporting requirements on manufacturers of high risk medical devices, impose an obligation on manufacturers to appoint a “qualified person” responsible for regulatory compliance, and provide for more strict clinical evidence requirements.

Regulation of medicinal products in the EEA

Medicinal Products require a marketing authorization before they may be placed on the market in the EEA. There are various application procedures available, depending on the type of product involved. The centralized procedure gives rise to marketing authorizations that are valid throughout the EEA. Applicants file marketing authorization applications with the European Medicines Agency (EMA)where they are reviewed by a relevant scientific committee, in most cases the Committee for Medicinal Products for Human Use (CHMP). The EMA forwards CHMP opinions to the European Commission, which uses them as the basis for deciding whether to grant a marketing authorization. The centralized procedure is compulsory for medicinal products that (1) are derived from specified biotechnology processes, (2) contain a new active substance (not yet approved on November 20, 2005) indicated for the treatment of certain diseases, such as HIV/AIDS, cancer, diabetes, neurodegenerative disorders, viral diseases or autoimmune diseases and other immune dysfunctions, (3) are orphan medicinal products or (4) are advanced therapy medicinal products (such as gene therapy, somatic cell therapy and tissue engineered products). For medicines that do not fall within these categories, an applicant may voluntarily submit an application for a centralized marketing authorization to the EMA, as long as the CHMP agrees that (i) the medicine concerned contains a new active substance (not yet approved on November 20, 2005), (ii) the medicine is a significant therapeutic, scientific, or technical

innovation, or (iii) if its authorization under the centralized procedure would be in the interest of public health. For those medicinal products for which the centralized procedure is not available, the applicant must submit marketing authorization applications to the national medicines regulators through one of three procedures: (1) a national procedure, which results in a marketing authorization in a single EEA member state; (2) the decentralized procedure, in which applications are submitted simultaneously in two or more EEA member states; and (3) the mutual recognition procedure, which must be used if the product has already been authorized in at least one other EEA member state, and in which the EEA member states are required to grant an authorization recognizing the existing authorization in the other EEA member state, unless they identify a serious risk to public health. A national procedure is only possible for one member state; as soon as an application is submitted in a second member state the mutual recognition or decentralized procedure will be triggered.

Marketing authorization applications must usually include the results of clinical trials. Clinical trials of medicinal products in the EEA must be conducted in accordance with EEA and national regulations and the International Conference on Harmonization guidelines on GCP. Prior to commencing a clinical trial in a particular EEA member state, the sponsor must obtain a clinical trial authorization from the competent authority and a positive opinion from an independent ethics committee.

There is scope for applicants to omit some or all of the pre‑clinical and clinical trial data if the product falls within the definition of a generic of a reference product for which regulatory data exclusivity protection has expired. If a marketing authorization is granted for a medicinal product containing a new active substance, that product benefits from eight years of data exclusivity, during which generic marketing authorization applications referring to the data of that product may not be accepted by the regulatory authorities, and a further two years of market exclusivity, during which such generic products may not be placed on the market. The two‑year period may be extended to three years if during the first eight years a new therapeutic indication with significant clinical benefit over existing therapies is approved.

For generic applications, the marketing authorization underpinning the reference medicinal product must be based on a complete dossier; a generic application referring to a generic dossier is not possible. Generic applicants may need to submit additional pre‑clinical or clinical data if their product does not fall within the definition of a generic (i.e., where there are differences in active substances, therapeutic indications, strength, pharmaceutical form or route of administration, in relation to the reference medicinal product, or where bioequivalence cannot be demonstrated through standard bioavailability studies). In these cases, bridging data is required to demonstrate that the differences do not affect the product’s relative safety and effectiveness inappropriately.

Pre‑clinical and clinical data can be omitted and replaced with references to scientific literature if the product has been in well‑established medicinal use in the European Union for at least 10 years. An existing marketing authorization holder may also give consent for a subsequent applicant to reference the pharmaceutical, pre‑clinical and clinical data on file for the original product.

In the EEA, companies developing a new medicinal product must agree a Paediatric Investigation Plan (PIP) with the EMA and must conduct pediatric clinical trials in accordance with that PIP, unless a waiver applies, e.g., because the relevant disease or condition occurs only in adults. The marketing authorization application for the product must include the results of pediatric clinical trials conducted in accordance with the PIP, unless a waiver applies, or a deferral has been granted, in which case the pediatric clinical trials must be completed at a later date.

Medicinal products may only be manufactured in the EEA, or imported into the EEA from another country, by the holder of a manufacturing authorization from the competent national authority. The product must have been manufactured in accordance with EU standards of GMP before it can be released onto the EEA market. Manufacturing facilities are subject to periodic inspections by the competent authorities for compliance with GMP.

The holders of marketing authorizations in the EEA are subject to various post‑approval controls and requirements. These include the establishment of a pharmacovigilance system and reporting of adverse reactions. The regulatory authorities may impose specific obligations as a condition of the marketing authorization, such as additional safety monitoring, or the conduct of additional clinical trials or post‑authorization safety studies. There are also specific rules governing advertising and promotion of medicinal products, including a requirement that all advertising and promotional activities for the product be consistent with the approved summary of product characteristics, and a prohibition on direct‑to‑consumer advertising of prescription medicines.

Other

Our operations and many of the products we manufacture or sell are subject to extensive regulation by numerous other governmental agencies, both within and outside the United States. In the United States, apart from the agencies discussed above, our facilities, operations, employees, products (their manufacture, sale, import and export) and services are regulated by Environmental Protection Agency, the Occupational Health & Safety Administration, the Department of Labor, Customs and Border Protection, the Department of Commerce, the Department of Treasury, the Department of Justice and others. Furthermore, because we supply products and services to healthcare providers that are reimbursed by federally funded programs such as Medicare, our activities are also subject to regulation by the Centers for Medicare and Medicaid Services and enforcement by the Office of the Inspector General within the Department of Health and Human Services. We are also required to report payments and other transfers of value to physicians and teaching hospitals, among others. State agencies also regulate our facilities, operations, employees, products and services within their respective states. Government agencies outside the United States also regulate public health, product registration, manufacturing, environmental conditions, labor, exports, imports and other aspects of our global operations.

Employees

As of December 31, 2015, we had 182 employees, with 95 in sales and marketing, 66 in research and development, clinical, regulatory and quality assurance, 11 in general and administrative, and 10 in manufacturing and distribution. We often supplement our research and development and clinical, regulatory and quality assurance departments with independent consultants on a project basis. We believe that our future success will depend in part on our continued ability to attract, hire and retain qualified personnel. None of our employees is represented by a labor union. We consider our relationship with our employees to be good.

Available Information

Our Annual Report on Form 10-K, Quarterly Reports on Form 10-Q, Current Reports on Form 8-K and amendments to reports filed or furnished pursuant to Sections 13(a) and 15(d) of the Exchange Act, are available on our web site at www.glaukos.com, free of charge, as soon as reasonably practicable after the electronic filing of these reports with, or furnishing of these reports to, the SEC. Any materials we file with the Securities and Exchange Commission (SEC) are available at the SEC’s Public Reference Room at 100 F Street, NE, Washington, DC 20549. Additional information about the operation of the Public Reference Room can also be obtained by calling the SEC at 1-800-SEC-0330. In addition, the SEC maintains a web site at www.sec.gov that contains reports, proxy and information statements, and other information regarding issuers that file electronically with the SEC, including us.

ITEM 1A.RISK FACTORS

Our business faces significant risks and uncertainties. Certain important factors may have a material adverse effect on our business prospects, financial condition and results of operations, and you should carefully consider them. Accordingly, in evaluating our business, we encourage you to consider the following discussion of risk factors, in its entirety, in addition to other information contained in or incorporated by reference into this Annual Report on Form 10-K and our other public filings with the SEC. Other events that we do not currently anticipate or that we currently deem immaterial may also affect our business, prospects, financial condition and results of operations.

Risks Related to Our Business

We have incurred significant losses since inception and there can be no guarantee as to when, if ever, we may be able to achieve or sustain profitability.

Since inception in July 1998, we have incurred significant operating losses. For the years ended December 31, 2015, 2014 and 2013, we had net losses of $38.3 million, $14.1 million and $14.2 million, respectively. As of December 31, 2015, we had an accumulated deficit of approximately $196.6 million. Losses have resulted principally from costs incurred in our clinical trial, research and development programs and from our general and administrative expenses. Additionally, in 2015, we recorded a charge of $25.7 million incurred with the deconsolidation of the non‑glaucoma

related assets of DOSE and elimination of the noncontrolling interest. To date, we have financed our operations primarily through the sale of equity securities, debt financing through a credit line and, more recently, sales of the iStent. We have devoted substantially all of our resources to the research and development of our products, the commercial launch of the iStent, the development of our proprietary sales network, and the assembly of a management team to build our business.

To implement our business strategies we need to, among other things, further grow our sales and marketing infrastructure to increase market acceptance of the iStent and any other products that receive FDA approval, fund ongoing research and development activities, expand our manufacturing capabilities, and obtain regulatory clearance or approval to commercialize our existing products in international markets or to commercialize those currently under development in the United States and internationally. As a result, we expect our expenses to increase significantly as we pursue these objectives. The extent of our future operating losses and the timing of profitability are highly uncertain, especially given our limited commercial history with the iStent, which makes forecasting our sales more difficult. We will need to generate significant additional net sales to achieve and maintain profitability, and even if we achieve profitability, we cannot be sure that we will remain profitable for any substantial period of time. Our failure to achieve or sustain profitability could have an adverse effect on the value of our common stock.

Substantially all of our net sales are generated from sales of the iStent, which has a limited commercial history, and we are completely dependent on its success. If the iStent or our other products under development fail to gain widespread market acceptance, our business will suffer.

Our primary sales‑generating commercial product is the iStent, which we began selling in the United States in the third quarter of 2012. We rely heavily upon sales in the United States, which comprised 94.4% and 94.2% of our net sales for the years ended December 31, 2015 and 2014, respectively. We expect to continue to derive a significant portion of our net sales from sales of the iStent in the United States, even if we are successful in commercializing our iStent products outside the United States, or receive necessary approvals to commercialize the iStent Inject, iStent Supra and iDose. Accordingly, our ability to generate net sales is highly dependent on our ability to market and sell the iStent.

We have pioneered MIGS to revolutionize the traditional glaucoma treatment and management paradigm. The iStent is our first MIGS device and we are leveraging our platform technology to build a comprehensive and proprietary portfolio of micro‑scale injectable therapies designed to address the complete range of glaucoma disease states and progression. MIGS and our MIGS devices may not gain sufficient market acceptance among eye care professionals, patients, healthcare payors and the medical community. There are a number of other available therapies marketed for the treatment of glaucoma, including medication therapies that are well established and are widely accepted by the medical community. Eye care professionals, patients, healthcare payors and the medical community may be slow or fail to adopt our products for a variety of reasons, including, among others:

If we are not successful in increasing market acceptance of our products, overall utilization of our products may fall below targeted levels and our future net sales will be adversely impacted. Because of the numerous risks and

uncertainties associated with our commercialization efforts, we are unable to predict the extent to which we will continue to generate net sales from our products or the timing for when or the extent to which we will become profitable. Even if we do achieve profitability, we may not be able to sustain or increase profitability on an ongoing basis.

We have limited experience marketing and selling the iStent. If we are unable to leverage our existing direct sales and marketing infrastructure to increase market acceptance of our products, we may not achieve sufficient net sales growth to become profitable.

We began marketing the iStent in the United States after receiving FDA approval in 2012. As a result, we have limited experience marketing and selling the iStent. Our operating results are directly dependent upon the sales and marketing efforts of our employees. If our direct sales representatives fail to adequately promote, market and sell our products, our sales may suffer.

In order to generate increased sales, we will need to leverage our existing direct sales organization, including targeted expansion to ensure sufficient geographic coverage . As a result, our future success will depend largely on our ability to continue to train, retain and motivate skilled regional sales managers and direct sales representatives with significant technical knowledge of MIGS and the iStent. Because of the competition for their services, we cannot assure you we will be able to retain our direct sales representatives on favorable or commercially reasonable terms, if at all. Failure to retain qualified sales representatives would prevent us from expanding our business and generating sales.

If we are unable to leverage our competitive sales and marketing infrastructure, we may not be able to effectively commercialize our products, which would adversely affect our business, results of operations and financial condition.

We face manufacturing risks that may adversely affect our ability to manufacture products and could reduce our gross margins and negatively affect our operating results.

Our business strategy depends on our ability to manufacture our current and proposed products in sufficient quantities and on a timely basis so as to meet customer demand, while adhering to product quality standards, complying with regulatory requirements and managing manufacturing costs. We currently have a single manufacturing facility located at our corporate headquarters in Laguna Hills, California, where we manufacture, inspect, package, release and ship all final products. If this facility suffers a crippling event, or a force majeure event, this could materially impact our ability to operate.

We will require additional space as our business expands. Accordingly, in June 2015 we entered into a sublease for an approximately 37,700 square foot facility located in San Clemente, California effective September 1, 2015, as well as a five‑year lease for these premises that takes effect January 1, 2017 upon expiration of the sublease. We plan for this facility to serve as our headquarters beginning sometime in 2016. The new facility will require regulatory approvals. In addition, it will be costly and time‑consuming to expand our operations and recruit necessary additional personnel. If we are unable to expand our manufacturing facility in compliance with regulatory requirements or to hire additional necessary manufacturing personnel, we may encounter delays or additional costs in achieving our research, development and commercialization objectives, including in obtaining regulatory approvals of our product candidates and meeting customer demand, which could materially damage our business and financial position.

We are also subject to numerous other risks relating to our manufacturing capabilities, including:

These risks are likely to be exacerbated by our limited experience with our current products and manufacturing processes. As demand for our products increases, we will have to invest additional resources to purchase components, hire and train employees and enhance our manufacturing processes. If we fail to increase our production capacity efficiently, our sales may not increase in line with our expectations and our operating margins could fluctuate or decline. In addition, although we expect some of our products in development to share product features and components with the iStent, the manufacture of these products may require the modification of our current production processes or unique production processes, the hiring of specialized employees, the identification of new suppliers for specific components or the development of new manufacturing technologies. It may not be possible for us to manufacture these products at a cost or in quantities sufficient to make these products commercially viable or to maintain current operating margins.

We depend on a limited number of third‑party suppliers for certain components, and the loss of any of these suppliers, or their inability to provide us with an adequate supply of materials, could harm our business.

We rely on a limited number of third‑party suppliers to supply components for the iStent, the iStent Inject and its unique injector system and our other pipeline products. Other than agreements with key suppliers, we generally do not enter into long‑term supply agreements with our suppliers, and we order most components on a purchase order basis. In some cases, we have a sole supplier or a limited number of suppliers. For example, we rely on one machining company to manufacture the titanium iStent implant and one pharmaceutical supplier for the heparin used in the iStent’s heparin coating. While we believe that there are at least several other vendors that could supply the titanium implant, and other pharmaceutical vendors that could supply heparin, we have not yet qualified any of these vendors, which could cause delay, thereby impairing our ability to meet the demand of our customers. Although we maintain inventory to mitigate supply interruptions, we are nevertheless exposed to risks, including limited control over costs, availability, quality and delivery schedules.

Moreover, due to the recent commercialization of the iStent and the limited amount of sales to date, we do not have long‑standing relationships with our suppliers and may not be able to convince suppliers to continue to make components available to us unless the volume of our orders continues to increase. As a result, there is a risk that certain components could be discontinued and no longer available to us.

We have in the past been, and we may in the future be, required to make significant “last time” purchases of components that are being discontinued by the supplier to ensure supply continuity. In addition, given our limited experience with these suppliers, it may be difficult for us to assess their ability to timely meet our demand in the future based on past performance. If any one or more of our suppliers cease to provide us with sufficient quantities of components in a timely manner or on terms acceptable to us, we would have to seek alternative sources of supply. Because of factors such as the proprietary nature of our products, our quality control standards and regulatory requirements, we cannot quickly engage additional or replacement suppliers for some of our critical components. Even if we are able to identify and qualify a suitable second source to replace one of our key suppliers, if necessary, that replacement supplier would not have access to our previous supplier’s proprietary processes and would therefore be required to develop its own, which could result in further delay.

Failure of any of our suppliers to deliver products at the level our business requires would limit our ability to meet our sales commitments, which could harm our reputation and could have a material adverse effect on our business. We may also have difficulty obtaining similar components from other suppliers that are acceptable to the FDA or other regulatory agencies, and the failure of our suppliers to comply with strictly enforced regulatory requirements could expose us to regulatory action including warning letters, product recalls, termination of distribution, product seizures or civil penalties. It could also require us to cease using the components, seek alternative components or technologies and modify our products to incorporate alternative components or technologies, which could result in a requirement to seek additional regulatory approvals. Our suppliers may also encounter financial or other hardships unrelated to our demand for components, which could inhibit their ability to fulfill our orders and meet our requirements. Any disruption of this nature or increased expense could harm our commercialization efforts and adversely affect our operating results.

In addition, we rely on our suppliers to supply us with components that comply with regulatory requirements and quality control standards, and meet agreed upon specifications, all at acceptable costs and on a timely basis. Although we expect our third‑party suppliers to act consistent with such standards, we do not control our suppliers, as

they operate and oversee their own businesses. There is a risk that our suppliers will not always act consistent with our best interests, and may not always supply components that meet our needs. Accordingly, if we fail to obtain sufficient quantities of high‑quality components to meet demand for our products on a timely basis, we could lose customer orders, our reputation may be harmed and our business could suffer.

We currently operate primarily at a facility in a single location and any crippling accident, force majeure event or disruption at this facility could materially affect our ability to operate and produce saleable products and could shut down our manufacturing capacity for an extended period.

Our principal office is currently located in one building in Laguna Hills, California. Following the relocation of our corporate headquarters to the facility located in San Clemente, California, we will continue to operate primarily in a single location. Thus, substantially all of our operations are and will continue to be conducted at a single location, including our manufacturing processes, research and development activities, customer and technical support, and management and administrative functions. In addition, substantially all of our inventory of component supplies and finished goods is and will be held at a single location. Despite our efforts to safeguard our facilities, including acquiring insurance, adopting environmental health and safety protocols and utilizing off‑site storage of computer data, vandalism, terrorism or a natural or other disaster, such as an earthquake, fire or flood, could damage or destroy our manufacturing equipment or our inventory of component supplies or finished goods, cause substantial delays in our operations, result in the loss of key information, and cause us to incur additional expenses, including relocation expenses. Our insurance may not cover our losses in any particular case. In addition, regardless of the level of insurance coverage, damage to our facilities may have a material adverse effect on our business, financial condition and operating results 

Failure to secure and maintain adequate coverage or reimbursement by third‑party payors in the United States for procedures using the iStent or our other products in development, or changes in current coverage or reimbursement, could materially impact our net sales and future growth.

We currently derive nearly all our net sales from sales of the iStent in the United States and expect this to continue for the next several years. Hospitals and ambulatory surgery centers that purchase the iStent typically bill various third‑party payors, including Medicare, Medicaid, private commercial insurance companies, health maintenance organizations and other healthcare‑related organizations, to cover all or a portion of the costs and fees associated with the MIGS procedures in which the iStent is used and bill patients for any applicable deductibles or co‑payments. Access to adequate coverage and reimbursement for the procedures using the iStent (and our other products in development) by third‑party payors is essential to the acceptance of our products by our customers.

Because there is generally no separate reimbursement for medical devices and other supplies used in such procedures, including the iStent, the additional cost associated with the use of our iStent device could impact the profit margin of the hospital or surgery center where the cataract surgery is performed if the incremental facility fee payment is not sufficient. Some of our target customers may be unwilling to adopt our iStent in light of the additional associated cost. Further, any decline in the amount payors are willing to reimburse our customers for MIGS procedures could make it difficult for existing customers to continue using, or new customers to adopt, our iStent devices and could create additional pricing pressure for us. If we were forced to lower the price we charge for our products, our gross margins would decrease, which would adversely affect our ability to invest in and grow our business.

Third‑party payors, whether foreign or domestic, or governmental or commercial, are developing increasingly sophisticated methods of controlling healthcare costs. In addition, in the United States, no uniform policy of coverage and reimbursement for medical device products and services exists among third‑party payors. Therefore, coverage and reimbursement for medical device products and services can differ significantly from payor to payor. In addition, payors continually review new technologies for possible coverage and can, without notice, deny coverage for these new products and procedures. As a result, the coverage determination process is often a time‑consuming and costly process that will require us to provide scientific and clinical support for the use of our products to each payor separately, with no assurance that coverage and adequate reimbursement will be obtained, or maintained if obtained.

Many third‑party payors in the United States model their coverage policies and payment amounts after those determined by the CMS, the federal agency responsible for administering the Medicare program. CMS relies on a network of MACs, which process nearly 4.9 million Medicare claims each day and disburse more than $365 billion annually, to develop coverage policies when no national coverage determination exists for a procedure. Because there

currently is no Medicare national coverage determination for procedures using our iStent devices, we are required to provide scientific and clinical support for the use of the iStent (including the iStent Inject device and iStent Supra device, if approved) to each MAC separately, with no assurance that coverage and adequate reimbursement will be obtained. Although all MACs currently provide coverage and reimbursement for the MIGS procedure using the iStent, difficulties in processing reimbursement or regional differences in the reimbursement amount for the physician professional services could negatively impact further iStent penetration or usage by customers. These differences in MAC reimbursement could also negatively impact the amount paid by private commercial insurance companies, further negatively affecting customer penetration or usage.

Third‑party payors, including CMS, regularly assess and propose changes to their coverage and reimbursement policies. Changes in these current policies impact the profit margin of the hospital or surgery center where the surgery is performed and increase costs to customers. For example, beginning in 2016, Medicare will make a single, comprehensive payment for combination iStent insertion and cataract procedures performed in hospital outpatient departments, or HOPDs, eliminating the separate payments that were available for the procedures in prior years and reducing the total reimbursement amount for the combination procedure in the HOPD. Further, any decline in the amount payors are willing to reimburse our customers for MIGS procedures could make it difficult for existing customers to continue using, or new customers to adopt, our iStent devices and could create additional pricing pressure for us. If we were forced to lower the price we charge for our products, our gross margins would decrease, which would adversely affect our ability to invest in and grow our business.

Some third‑party payors in the United States, including Medicaid and TRICARE and certain commercial payors, have developed policies that deny coverage for the MIGS procedure using the iStent. To support changes in these policies, we may need to conduct prospective, randomized controlled clinical trials and present data from such trials to these payors to demonstrate the medical necessity or cost‑effectiveness of the iStent. There can be no assurance that coverage for our products will be expanded. In addition, those private payors that do not follow the Medicare guidelines may adopt different coverage and reimbursement policies for MIGS procedures performed with the iStent, though we cannot predict whether coverage will be sufficient or if there will be coverage at all. Failure to obtain favorable payor policies could have a material adverse effect on our business and operations.

We believe that Medicare coverage and existing coverage by third‑party payors represents approximately 90% of our target patient population. U.S. third‑party payors representing approximately 80% of individuals covered by commercial insurance currently reimburse the iStent procedure. While we anticipate gaining coverage and reimbursement from additional third‑party payors, we cannot guarantee that we will be successful or that coverage and reimbursement will be at levels that support continued penetration and usage by our customers. Moreover, compliance with the administrative procedures and requirements of third‑party payors may result in delays in processing approvals by those third‑party payors for customers to obtain coverage and reimbursement for procedures using the iStent. Failure to secure or maintain adequate coverage or reimbursement for procedures using the iStent by third‑party payors, or delays in processing approvals by those payors, could result in the cancellations of procedures to insert the iStent in combination with cataract surgery, resulting in the loss of net sales from these procedures. If these issues remain unresolved, they could have a material adverse effect on our business, financial condition and operating results.

In addition, although we have obtained temporary Category III Current Procedural Terminology codes for the MIGS procedures associated with the insertion of our iStent products, there is no guarantee that these billing codes or the payment amounts associated with such codes will not change in the future. Category III codes expire five years after the date they become effective. Prior to expiration, there are two options: submit an application to convert to a permanent Category I code; or submit an application for a five year extension of Category III status. If we are unable to maintain our existing codes or obtain new permanent Category I codes for procedures using our iStent products, or obtain new reimbursement codes for our other products in development, we will be subject to significant pricing pressure, which could harm our business, results of operations, financial condition and prospects.

Further, we believe that future coverage and reimbursement will likely be subject to increased restrictions both in the United States and in international markets. Coverage decisions may depend upon clinical and economic standards that disfavor new products when more established or lower cost therapeutic alternatives are already available or subsequently become available. Adequate coverage and reimbursement from governmental and commercial payors are critical to new product acceptance. Third‑party coverage and reimbursement for our products or any of our product

candidates for which we may receive regulatory approval may not be available or adequate in either the United States or international markets.

The medical device industry is highly competitive and subject to rapid technological change. Many of our current and potential competitors (including MIGS competitors) are large public companies or divisions of publicly traded companies and have several competitive advantages. If our competitors are better able to develop and market products that are safer, more effective, less costly or otherwise more attractive than the iStent or any new products that we may develop, our commercial opportunity may be reduced or eliminated.

The medical device industry is highly competitive and subject to rapid and profound technological change. Our success depends, in part, upon our ability to maintain a competitive position in the development of MIGS products.

We compete primarily with the use of medication therapy for treating glaucoma and with manufacturers of medical devices used in surgical therapy procedures for treating glaucoma, including Alcon, Inc. (which has entered into a definitive agreement to acquire Transcend Medical, Inc., a MIGS competitor), Abbott Medical Optics Inc., Allergan plc (which has entered into a definitive merger agreement with Pfizer, Inc., pursuant to which the two companies intend to combine), STAAR Surgical Company, Lumenis Ltd., NeoMedix,Inc. and Ellex Medical Lasers Limited. Alcon, Inc. and Abbott Medical Optics Inc. are the leading manufacturers of aqueous shunts, and Alcon, Inc. also markets the EX‑ PRESS Glaucoma Filtration Device and, upon its completion of the Transcend Medical, Inc. acquisition, will be a manufacturer of a MIGS device. Lumenis Ltd. is a leading manufacturer of selective laser trabeculoplasty equipment. Neomedix, Inc. markets an electrosurgical device, and Ellex Medical Lasers Limited markets a canaloplasty device that some physicians employ to lower intraocular pressure in glaucoma.

Our competitors, medical companies, academic and research institutions or others could develop new drugs, therapies, medical devices or surgical procedures to treat glaucoma that could render our products obsolete. For example, we are aware of several companies, including Transcend Medical, Inc., AqueSys, Inc., InnFocus Inc. and Ivantis Inc. that are conducting FDA‑approved IDE clinical trials or have filed for regulatory approval of MIGS devices. These products or other products that may be developed could demonstrate better safety or effectiveness, clinical results, ease of use or lower costs than our iStent or other products under development. If approved for marketing, these devices may compete directly with the iStent and our products under development. If any of these alternative technologies gain market acceptance, this may reduce demand for our primary product, the iStent, as well as for our products in development. Demand for the iStent or our future products may decline if such a product or technology were introduced, and our business may be harmed.

Many of our current and potential competitors (including MIGS competitors) are large public companies or divisions of publicly‑traded companies and have several competitive advantages, including:

Recently, AqueSys, Inc. was acquired by Allergan plc, a publicly‑traded company, and Allergan and Pfizer, Inc. have entered into a definitive merger agreement, pursuant to which the two companies intend to combine. Similarly, Alcon, Inc. (a division of Novartis International AG, which is a publicly traded multinational pharmaceutical company based in Basel, Switzerland) has entered into a definitive agreement to acquire Transcend Medical, Inc. As a result of

these transactions and in the event other companies that are developing MIGS devices are acquired by larger companies, we could be competing directly against other MIGS competitors that could have the competitive advantages identified above.

The training required for surgeons to use the iStent could reduce the market acceptance of our products.

As with any new method or technique, ophthalmic surgeons must undergo a thorough training program before they are qualified to perform the iStent procedure. Surgeons could experience difficulty with the technique necessary to successfully insert the iStent, intraoperative gonioscopy, and not achieve the technical competency necessary to be qualified to insert our stents. Also, even after successfully completing the training program, the physicians could experience difficulty inserting our products and cease utilizing them or limit their use significantly in practice.

We could also experience difficulty meeting expected levels of ophthalmic surgeons who complete our training program. This could happen due to less demand than expected, the length of time necessary to train each surgeon being longer than expected, the capacity of our sales representatives to train surgeons being less than anticipated, or if we are unable to sufficiently increase our sales organization. All of these events would lead to fewer trained ophthalmic surgeons qualified to insert the iStent, which could negatively impact our operating and financial results.

Ophthalmic surgeons not completing the iStent training program may nevertheless elect to perform iStent procedures and experience inferior clinical outcomes.

Although our sales representatives manage the training program for ophthalmic surgeons to become qualified to insert the iStent in combination with cataract surgery, once training is completed the surgeon and/or surgical facility that the surgeon utilizes are cleared to order and maintain an iStent supply. There is a risk that untrained or unqualified ophthalmic surgeons could gain access to iStent devices from a facility’s inventory and conduct iStent procedures without having received qualified status from us. If performing iStent procedures by unqualified ophthalmic surgeons were to become pervasive, this could raise the risk of complications and inferior clinical outcomes, which could result in negative patient experiences or experiences being published and damaging our reputation and that of the iStent. This could result in lower penetration and utilization by ophthalmic surgeons and could have a material adverse effect on our net sales growth, expected operating results and financial condition.

The safety and efficacy of the iStent and our other products are not yet supported by long‑term clinical data in large numbers of patients. Ophthalmic surgeons may not use our products if they do not believe they are safe, efficient, effective and preferable alternatives to other treatment solutions in the market.

We believe that ophthalmic surgeons will not use our products unless they conclude that our products provide a safe, efficient, effective and preferable alternative to currently available treatment options. If longer‑term patient studies or clinical experience indicate that treatment with our products is less effective, less efficient or less safe than our current data suggest, our sales would be harmed, and we could be subject to significant liability. Further, unsatisfactory patient outcomes or patient injury could cause negative publicity for our products, particularly in the early phases of product introduction. In addition, physicians may be slow to adopt our products if they perceive liability risks arising from their use. It is also possible that as our products become more widely used, latent defects could be identified, creating negative publicity and liability problems for us and adversely affecting demand for our products. If an increasing number of ophthalmic surgeons do not continue to adopt the use of our products, our operating and financial results will be negatively impacted.

Product liability suits brought against us could cause us to incur substantial liabilities, limit sales of our existing products and limit commercialization of any products that we may develop.

If our product offerings, including the iStent, are defectively designed or manufactured, contain defective components, or are used or deployed improperly, or if someone claims any of the foregoing, whether or not such claims are meritorious, we may become subject to substantial and costly litigation. Any product liability claims brought against us, with or without merit, could divert management’s attention from our business, be expensive to defend, result in sizable damage awards against us, damage our reputation, increase our product liability insurance rates, prevent us from securing continuing coverage, or prevent or interfere with commercialization of our products. In addition, we may not have sufficient insurance coverage for all future claims. Product liability claims brought against us in excess of our insurance coverage would likely be paid out of cash reserves, harming our financial condition and results of operations.

Operating results could be unpredictable and may fluctuate significantly from quarter to quarter, which could adversely affect our business, financial condition, results of operations and the trading price of our common stock.

Because we have limited experience marketing and selling the iStent, our net sales from the sale of the iStent may experience volatility due to a number of factors, many of which are beyond our control, including:

As a result, you should not rely on our results in any past period as an indication of future results and you should anticipate that fluctuations in our quarterly and annual operating results may continue and could generate volatility in the price of our common stock. We believe that quarterly comparisons of our financial results are not necessarily meaningful and should not be relied upon as an indication of our future performance.

Our long‑term growth depends on our ability to develop and commercialize additional products using our iStent technologies. If we are not able to commercialize products in development in a timely manner, our products may become obsolete over time, customers may not buy our products and our net sales and profitability may decline.

Demand for our products may change in ways we may not anticipate due to:

As a result, it is important that we continue to build a more complete product offering using our iStent technologies. Developing additional products is expensive and time‑consuming, and could divert management’s attention away from expanding acceptance of the iStent and harm our business. Even if we are successful in developing additional products, including those currently in development, the success of our new product offerings, if any, will depend on several factors, including our ability to:

Moreover, we will need to make a substantial investment in research and development before we can determine the commercial viability of any innovations, and we may not have the financial resources required to fund such research and development. In addition, even if we are able to successfully develop product enhancements or new products, these enhancements or new products may not produce net sales in excess of the costs of development, or they may be quickly rendered obsolete by changing customer preferences or the introduction by our competitors of products embodying superior technologies or features.

Research programs to identify new products will require substantial technical, financial and human resources, whether or not any such products are ultimately identified. We may determine that one or more of our pre‑clinical programs does not have sufficient potential to warrant the allocation of such resources. Our research programs may initially show promise in identifying potential products, yet fail to yield product candidates for clinical development for many reasons, including the following:

If we fail to manage our anticipated growth effectively, our business could suffer.

Since commercial launch of the iStent in July 2012, we have seen significant period‑to‑period growth in our business. We anticipate that this rapid growth will continue in the near term as the iStent continues to gain market acceptance. Not only do we expect this growth to continue, but we must continue to grow in order to meet our business and financial objectives. However, continued growth may create numerous challenges, including:

If we fail to manage any of the above challenges effectively, our business may be harmed.

Our future growth depends on our ability to retain members of our senior management and other key employees. If we are unable to retain or recruit qualified personnel for growth, our business results could suffer.

We have benefited substantially from the leadership and performance of our senior management as well as certain key employees. For example, our chief executive officer, as well as other key members of our senior management, have experience successfully developing novel technologies and scaling early‑stage medical device companies to achieve profitability. Our success will depend on our ability to retain our current management and key employees, and to attract and retain qualified personnel in the future. Competition for senior management and key employees in our industry is intense and we cannot guarantee that we will be able to retain our personnel or attract new, qualified personnel. The loss of services of certain members of our senior management or key employees could prevent or delay the implementation and completion of our strategic objectives, or divert management’s attention to seeking qualified replacements. Each member of senior management as well as our key employees may terminate employment without notice and without cause or good reason. The members of our senior management are not subject to non‑competition agreements. Accordingly, the adverse effect resulting from the loss of certain members of senior management could be compounded by our inability to prevent them from competing with us.

In addition to competing for market share for our products, we also compete against these companies for personnel, including qualified sales representatives that are necessary to grow our business. Also, we compete with universities and research institutions for scientific and clinical personnel that are important to our research and development efforts.

We also rely on consultants and advisors in our research, operations, clinical and commercial efforts to implement our business strategies. Our consultants and advisors may be employed by employers other than us and may have commitments under consulting or advisory contracts with other entities that may limit their availability to us.

Our strategic plan requires us to continue growing our sales, marketing, clinical and operational infrastructure in order to generate, and meet, the demand for our products. If we fail to retain or attract these key personnel, we could fail to take advantage of the market for our iStent technologies and our business, financial condition and operating results could be adversely affected.

Our iDose implant will be regulated as a drug and be subject to a different regulatory approval process than our other products in development. iDose is in early stages of development and may never be commercialized.

As a drug delivery implant, the iDose will be subject to a regulatory approval process similar to that for pharmaceuticals. This process is often a more lengthy and complex process than obtaining regulatory approval as a medical device. The future success of our iDose product candidate depends on our ability to complete clinical trials, and will require significant development activities, clinical trials, regulatory approvals, and substantial additional investment.

This development program may not lead to a commercially viable product for several reasons. For example, we may fail to demonstrate safety and efficacy in pre‑clinical tests or clinical trials, or we may have inadequate financial or other resources to pursue drug development efforts. From time to time, we may establish and announce certain development goals for our iDose product candidate; however, it is difficult to predict accurately if and when we will achieve these goals. We may be unsuccessful in advancing this drug delivery implant into clinical testing or in obtaining FDA approval, and our long‑term business prospects could be harmed.

Our business requires substantial capital and operating expenditures to operate and grow.

Although we raised net proceeds of approximately $113.6 million from our IPO and generate net sales from our first FDA‑approved product, the iStent, we may nevertheless need to raise substantial additional capital in the future to:

We believe that the net proceeds from our IPO, together with our existing cash, cash equivalents, short‑term investment balances and interest we earn on these balances and cash generated from sales of our iStent products will be sufficient to meet our anticipated cash requirements for the next 12 months. However, our future funding requirements will depend on many factors, including:

If we raise additional funds through further issuances of equity or issuances of convertible debt securities, our existing stockholders could suffer significant dilution, and any new equity securities we issue could have rights, preferences and privileges superior to those of holders of our common stock. Any debt financing obtained by us in the future would likely be senior to our common stock, would likely cause us to incur interest expense, and could involve restrictive covenants relating to our capital raising activities and other financial and operational matters, which may increase our expenses and make it more difficult for us to obtain additional capital and to pursue business opportunities, including potential acquisitions. We may also be required to secure any such debt obligations with some or all of our assets.

We cannot assure you that we will be able to obtain additional financing on terms favorable to us, if at all. If we are unable to obtain adequate financing or financing on terms satisfactory to us when we require it, or if we expend capital on projects that are not successful, our ability to continue to support our business growth and to respond to business challenges could be significantly limited, or we may even have to scale back our operations.

We may enter into acquisitions, collaborations, in‑licensing agreements, joint ventures, alliances or partnerships with third parties that fail to result in a commercial product or net sales.

We do not have any current commitments to enter into any acquisitions, collaborations, in‑licensing agreements, joint ventures, alliances or partnerships. We may in the future choose to undertake one or more of these transactions in order to retain our competitive position within the marketplace or to expand into new markets. However, we cannot assure you that we would be able to successfully complete any acquisition we choose to pursue, or that we would be able to successfully integrate any acquired business, product or technology in a cost‑effective and non‑disruptive manner. If we were unable to integrate any acquired businesses, products or technologies effectively, our business would likely suffer.

Failure to protect our information technology infrastructure against cyber-based attacks, network security breaches, service interruptions or data corruption could materially disrupt our operations and adversely affect our business and operating results.

The efficient operation of our business depends on our information technology systems. We rely on our information technology systems to effectively manage sales and marketing data, accounting and financial functions, inventory management, product development tasks, clinical data, customer service and technical support functions. Our information technology systems are vulnerable to damage or interruption from earthquakes, fires, floods and other natural disasters, terrorist attacks, cyber-based attacks, attacks by computer viruses or hackers, power losses, computer system or data network failures, security breaches and data corruption. In addition, a variety of our software systems are cloud‑based data management applications, hosted by third‑party service providers whose security and information technology systems are subject to similar risks.

The failure of either our or our service providers’ information technology could disrupt our entire operation or result in decreased sales, increased overhead costs and product shortages, all of which could have a material adverse effect on our reputation, business, financial condition and operating results.

Planned expansion into new markets outside of the United States will subject us to additional business and regulatory risks, and there can be no assurance that our products will be accepted in those markets.

Engaging in international business inherently involves a number of other difficulties and risks, including:

If we or our suppliers are unable to address these international risks, we may fail to establish and maintain an international presence, and our business, financial condition and results of operations could suffer.

We cannot be certain that our net operating loss tax carryforwards will be available to offset future taxable income.

As of December 31, 2015, we had net operating loss carryforwards of approximately $118.0 million for U.S. federal income tax purposes and approximately $98.0 million of net operating loss carryforwards for state income tax purposes.  The federal and state net operating loss carryforwards begin to expire in 2018 and 2016, respectively. At December 31, 2015, we had federal and state research and development carryforwards of $4.6 million and $5.1 million, respectively, which begin to expire in 2021 for federal purposes and carry over indefinitely for state purposes. We have recorded a full valuation allowance against these tax attributes because we believe that uncertainty exists with respect to the future realization of the tax attributes as well as with respect to the amount of the tax attributes that will be available in future periods. To the extent available, we intend to use these net operating loss carryforwards to offset future taxable income associated with our operations. There can be no assurance that we will generate sufficient taxable income in the carryforward period to utilize any remaining net operating loss carryforwards before they expire.

In addition, Section 382 of the Internal Revenue Code of 1986, as amended, or the Code, contains rules that limit for U.S. federal income tax purposes the ability of a corporation that undergoes an “ownership change” to utilize its net operating losses (and certain other tax attributes) existing as of the date of such ownership change. Under these rules, a corporation is treated as having had an “ownership change” if there is more than a 50% increase in stock ownership by one or more “five percent shareholders,” within the meaning of Section 382 of the Code, during a rolling three‑year period. We believe a portion of our existing net operating losses are subject to limitations arising from previous ownership changes, and if we undergo an ownership change, our ability to utilize our net operating losses to offset future taxable income could be further limited, which could have a negative effect on our liquidity. For these reasons, we may not be able to utilize a material portion of our net operating losses, even if we attain profitability.

Risks Related to the Regulatory Environment

We and our suppliers are subject to extensive federal and state regulation, and if we fail to comply with applicable regulations, we could suffer severe criminal or civil sanctions or be required to make significant changes to our operations that could adversely affect our business, financial condition and operating results.

The iStent is classified as a medical device. As a result, we are subject to extensive government regulation in the United States by the FDA and state regulatory authorities and by foreign regulatory authorities in the countries in which we conduct business. These regulations relate to, among other things, research and development, design, testing, clinical trials, manufacturing, clearance or approval, environmental controls, safety and efficacy, labeling, advertising, promotion, pricing, recordkeeping, reporting, import and export, post‑approval studies and the sale and distribution of the iStent and our other products in development.

In the United States, before we can market a new medical device, or a new use of, new claim for, or significant modification to, an existing product, we must first receive either clearance under Section 510(k) of the FDCA or approval of a PMA application from the FDA, unless an exemption applies. The process of obtaining PMA approval, which was required for the iStent, is much more costly and uncertain than the 510(k) clearance process. In the 510(k) clearance process, the FDA must determine that a proposed device is “substantially equivalent” to a device legally on the market, known as a “predicate” device, in order to clear the proposed device for marketing. To be “substantially equivalent,” the proposed device must have the same intended use as the predicate device, and either have the same technological characteristics as the predicate device or have different technological characteristics and not raise different questions of safety or effectiveness than the predicate device. Clinical data is sometimes required to support substantial equivalence. In the PMA approval process, the FDA must determine that a proposed device is safe and effective for its intended use based, in part, on extensive data, including, but not limited to, technical, pre‑clinical, clinical trial, manufacturing and labeling data. The PMA process is typically required for devices for which the 510(k) process cannot be used and that are deemed to pose the greatest risk.

Modifications to products that are approved through a PMA application generally need FDA approval. Similarly, some modifications made to products cleared through a 510(k) may require a new 510(k). The FDA’s 510(k) clearance process usually takes from three to 12 months, but may last longer. The process of obtaining a PMA generally takes from one to three years, or even longer, from the time the PMA is submitted to the FDA until an approval is obtained. Any delay or failure to obtain necessary regulatory approvals would have a material adverse effect on our business, financial condition and prospects.

The FDA can delay, limit or deny clearance or approval of a device for many reasons, including:

The research, testing, manufacturing, labeling, approval, selling, import, export, marketing and distribution of drug products is also subject to extensive regulation by the FDA and other regulatory authorities in the United States and other countries, which regulations differ from country to country. We are not permitted to market any drug product

candidate in the United States until we receive FDA approval of a NDA or other appropriate drug product application. Prior to submitting a marketing application, human clinical studies are required. In order for clinical studies of a new drug to commence in the United States, an IND application must be filed with the FDA; similar notifications are required in other countries. Informed consent also must be obtained from study participants. In general, studies may begin in the United States without specific approval by the FDA after a 30‑day review period has passed. However, the FDA may prevent studies from moving forward, and may suspend or terminate studies once initiated. Studies are also subject to review by an independent IRB  responsible for overseeing studies at particular sites and protecting human research study subjects. An IRB may prevent a study from beginning or suspend or terminate a study once initiated.

The FDA or other applicable foreign regulatory bodies can delay, limit or deny approval of a drug candidate for many reasons, including, but not limited to, the following:

Further, we are subject to laws directed at preventing fraud and abuse, which subject our marketing, training and other practices to government scrutiny. To ensure compliance with Medicare, Medicaid and other regulations, government agencies or their contractors often conduct routine audits and request customer records and other documents to support claims submitted for payment of services rendered. Government agencies or their contractors also periodically open investigations and obtain information from healthcare providers. Violations of federal and state regulations can result in severe criminal, civil and administrative penalties and sanctions, including debarment, suspension or exclusion from Medicare, Medicaid and other government reimbursement programs, any of which would have a material adverse effect on our business.

Legislative or regulatory reform of the healthcare system may affect our ability to sell our products profitably.

In the United States and in certain foreign jurisdictions, there have been a number of legislative and regulatory proposals to change the regulatory and healthcare systems in ways that could impact our ability to sell our products profitably, if at all. In the United States in recent years, new legislation has been proposed and adopted at the federal and state levels that is effecting major changes in the healthcare system. In addition, new regulations and interpretations of existing healthcare statutes and regulations are frequently adopted.

For example, in 2011, the FDA announced a Plan of Action to modernize and improve the FDA’s premarket review of medical devices, and has implemented, and continues to implement, reforms intended to improve the timeliness and predictability of the premarket review process. In addition, as part of the Food and Drug Administration Safety and Innovation Act of 2012, Congress enacted several reforms entitled the Medical Device Regulatory Improvements and additional miscellaneous provisions that will further affect medical device regulation both pre‑and

post‑approval.

If, as a result of legislative or regulatory healthcare reform, we cannot sell the iStent (or our other products in development, if approved) profitably, our business would be harmed. In addition, any change in the laws or regulations that govern the clearance and approval processes relating to our current and future products could make it more difficult and costly to obtain clearance or approval for new products, or to produce, market and distribute existing products.

In March 2010, the Patient Protection and Affordable Care Act, as amended by the Health Care and Education Reconciliation Act, or PPACA, was signed into law. While the goal of health care reform is to expand coverage to more individuals, it also involves increased government price controls, additional regulatory mandates and other measures designed to constrain medical costs. The PPACA substantially changes the way healthcare is financed by both governmental and private insurers, encourages improvements in the quality of healthcare items and services and significantly impacts the medical device industry. Among other things, the PPACA:

In addition, other legislative changes have been proposed and adopted since the PPACA was enacted. On August 2, 2011, the Budget Control Act of 2011 was signed into law, which, among other things, created the Joint Select Committee on Deficit Reduction to recommend to Congress proposals in spending reductions. The Joint Select Committee did not achieve a targeted deficit reduction of at least $1.2 trillion for the years 2013 through 2021, triggering the legislation’s automatic reduction to several government programs. This includes reductions to Medicare payments to providers of up to 2% per fiscal year, which went into effect on April 1, 2013 and, due to subsequent legislation, will remain in effect through 2025 unless additional Congressional action is taken. On January 2, 2013, the American Taxpayer Relief Act of 2012 was signed into law, which, among other things, further reduced Medicare payments to several providers, including hospitals, and increased the statute of limitations period for the government to recover overpayments to providers from three to five years. On April 16, 2015, President Obama signed into law the Medicare Access and CHIP Reauthorization Act of 2015, which, among other things, repealed the formula by which Medicare made annual payment adjustments to physicians and replaced the former formula with fixed annual updates and a new system of incentive payments scheduled to begin in 2019 that are based on various performance measures and physicians’ participation in alternative payment models such as accountable care organizations.

We expect that additional state and federal healthcare reform measures will be adopted in the future, any of which could limit the amounts that federal and state governments will pay for healthcare products and services, which could result in reduced demand for our products or product candidates or additional pricing pressures.

In September 2012, the European Commission published proposals for the revision of the EU regulatory framework for medical devices. The proposal would replace the Medical Devices Directive and two related directives concerning active implantable medical devices and in vitro diagnostic medical devices respectively with a new regulation concerning medical devices and another concerning in vitro diagnostic medical devices. Unlike Directives that must be implemented into national laws, the Regulations would be directly applicable in all EEA Member States and so are intended to eliminate current national differences in regulation of medical devices.

In October 2013, the European Parliament approved a package of reforms to the European Commission’s proposals. Under the revised proposals, only designated “special notified bodies” would be entitled to conduct

conformity assessments of high‑risk devices. These special notified bodies will need to notify the European Commission when they receive an application for a conformity assessment for a new high‑risk device. The Commission will then forward the notification and the accompanying documents on the device to the Medical Devices Coordination Group for an opinion. These new procedures may result in the re‑assessment of our existing medical devices, or a longer or more burdensome assessment of our new products. We anticipate that further amendments to this proposal may be agreed upon as a compromise among the various EU legislative bodies before the final regulation on medical devices is adopted, most likely in 2016.

The clinical trial process required to obtain regulatory approvals is lengthy and expensive with uncertain outcomes, and could result in delays in new product introductions.

Because of the indication we chose to pursue for the iStent, the FDA required that we seek PMA approval rather than clearance under the 510(k) process. In order to obtain PMA approval for a product, the sponsor must conduct well‑controlled clinical trials designed to assess the safety and efficacy of the product candidate. Similarly, a sponsor generally must conduct well‑controlled clinical trials designed to assess the safety and efficacy of a drug product candidate in order to obtain FDA approval of a drug product. We therefore will be required to conduct clinical trials to obtain approval of iDose, our drug delivery implant, new indications for the iStent or new product candidates. Conducting clinical trials is a complex and expensive process, can take many years, and outcomes are inherently uncertain. We incur substantial expense for, and devote significant time to, clinical trials but cannot be certain that the trials will ever result in commercial sales. We may suffer significant setbacks in clinical trials, even after earlier clinical trials showed promising results, and failure can occur at any time during the clinical trial process. Any of our products may malfunction or may produce undesirable adverse effects that could cause us or regulatory authorities to interrupt, delay or halt clinical trials. We, the FDA, or another regulatory authority may suspend or terminate clinical trials at any time to avoid exposing trial participants to unacceptable health risks.

Successful results of pre‑clinical studies are not necessarily indicative of future clinical trial results, and predecessor clinical trial results may not be replicated in subsequent clinical trials. Additionally, the FDA may disagree with our interpretation of the data from our pre‑clinical studies and clinical trials, or may find the clinical trial design, conduct or results inadequate to prove safety or efficacy, and may require us to pursue additional pre‑clinical studies or clinical trials, which could further delay the clearance or approval of our products. The data we collect from our pre‑ clinical studies and clinical trials may not be sufficient to support FDA clearance or approval, and if we are unable to demonstrate the safety and efficacy of our future products in our clinical trials, we will be unable to obtain regulatory clearance or approval to market our products.

In addition, we may estimate and publicly announce the anticipated timing of the accomplishment of various clinical, regulatory and other product development goals, which are often referred to as milestones. These milestones could include the obtainment of the right to affix the CE Mark in the European Union; the submission to the FDA of an IDE application, or an IND application, to commence a clinical trial for a new product candidate; the enrollment of patients in clinical trials; the release of data from clinical trials; and other clinical and regulatory events. The actual timing of these milestones could vary dramatically compared to our estimates, in some cases for reasons beyond our control. We cannot assure you that we will meet our projected milestones and if we do not meet these milestones as publicly announced, the commercialization of our products may be delayed and, as a result, our stock price may decline.

Clinical trials are necessary to support PMA applications for our device product candidates and may be necessary to support PMA supplements for modified versions of our marketed device products. This would require the enrollment of large numbers of suitable subjects, which may be difficult to identify, recruit and maintain as participants in the clinical trial. The clinical trials supporting the PMA application for the iStent involved 289 randomized patients. We expect that we will provide the FDA with data on the results of approximately 968 patients in three post‑approval studies. If the FDA were to require us to submit data on a greater number of patients or a longer follow‑up period, we would incur additional expenses that could be significant. Adverse outcomes in the post‑approval studies could also result in restrictions or withdrawal of approval of the PMA.

Before we can obtain regulatory approval for any drug product candidate, such as our iDose drug delivery implant, we must undertake extensive clinical testing in humans to demonstrate safety and efficacy to the satisfaction of the FDA and other regulatory agencies. Clinical trials of drug product candidates are expensive and take years to complete, and the outcome of such trials is uncertain. We are currently conducting a Phase I clinical trial of iDose in

Armenia and we expect to commence a Phase II clinical trial of iDose in the United States in early 2016. Our ability to conduct additional clinical trials depends on many factors, including the data obtained in the Phase I and the anticipated Phase II clinical trial.

Delays in the commencement or completion of clinical trials or testing could significantly affect our product development costs. We do not know whether planned clinical trials will begin on time, need to be redesigned, enroll an adequate number of patients in a timely manner or be completed on schedule, if at all. The commencement and completion of clinical trials can be delayed or terminated for a number of reasons, including delays or failures related to:

Patient enrollment in clinical trials and completion of patient follow‑up depend on many factors, including the size of the patient population, the nature of the trial protocol, the proximity of patients to clinical sites, the eligibility criteria for the clinical trial, patient compliance, competing clinical trials and clinicians’ and patients’ perceptions as to the potential advantages of the product being studied in relation to other available therapies, including any new treatments that may be approved for the indications we are investigating. For example, patients may be discouraged from enrolling in our clinical trials if the trial protocol requires them to undergo extensive post‑treatment procedures or follow‑up to assess the safety and efficacy of a product candidate, or they may be persuaded to participate in contemporaneous clinical trials of a competitor’s product candidate. In addition, patients participating in our clinical trials may drop out before completion of the trial or suffer adverse medical events unrelated to our products. Delays in patient enrollment or failure of patients to continue to participate in a clinical trial may delay commencement or completion of the clinical trial, cause an increase in the costs of the clinical trial and delays, or result in the failure of the clinical trial.

We could also encounter delays if the FDA concluded that our financial relationships with our principal investigators resulted in a perceived or actual conflict of interest that may have affected the interpretation of a study, the integrity of the data generated at the applicable clinical trial site or the utility of the clinical trial itself. Principal investigators for our clinical trials may serve as scientific advisors or consultants to us from time to time and receive cash compensation and/or stock options in connection with such services. If these relationships and any related compensation to or ownership interest by the clinical investigator carrying out the study result in perceived or actual conflicts of interest, or the FDA concludes that the financial relationship may have affected interpretation of the study, the integrity of the data generated at the applicable clinical trial site may be questioned and the utility of the clinical trial itself may be jeopardized, which could result in the delay or rejection of our application by the FDA. Any such delay or rejection could prevent us from commercializing any of our products currently in development.

Further, clinical trials may also be delayed as a result of ambiguous or negative interim results. In addition, a clinical trial may be suspended or terminated by us, the FDA, the IRB overseeing the clinical trial at issue, the Data

Safety Monitoring Board for such trial, any of our clinical trial sites with respect to that site, or other regulatory authorities due to a number of factors, including:

Additionally, changes in regulatory requirements and guidance may occur and we may need to amend clinical trial protocols to reflect these changes. Amendments may require us to resubmit our clinical trial protocols to IRBs for reexamination, which may impact the costs, timing or successful completion of a clinical trial. If we experience delays in completion of, or if we terminate, any of our clinical trials, the commercial prospects for our product candidates may be harmed and our ability to generate product revenues from these product candidates will be delayed or not realized at all. In addition, any delays in completing our clinical trials will increase our costs, slow down our product candidate development and approval process and jeopardize our ability to commence product sales and generate revenues. Any of these occurrences may significantly harm our business, financial condition and prospects significantly. In addition, many of the factors that cause, or lead to, a delay in the commencement or completion of a clinical trial may also ultimately lead to the denial of regulatory approval of the subject product candidate.

If the FDA does not conclude that the iDose drug delivery implant satisfies the requirements for the 505(b)(2) regulatory approval pathway, or if the requirements for approval of the iDose drug delivery implant under Section 505(b)(2) are not as we expect, the approval pathway will likely take significantly longer, cost significantly more and encounter significantly more complications and risks than anticipated, and in any case may not be successful.

We intend to seek FDA approval through the 505(b)(2) regulatory pathway for our drug delivery implant, iDose. The Drug Price Competition and Patent Term Restoration Act of 1984, also known as the Hatch‑Waxman Act, added Section 505(b)(2) to the FDCA. Section 505(b)(2) permits the filing of an NDA where at least some of the information required for approval comes from studies that were not conducted by or for the applicant.

If the FDA does not allow us to pursue the 505(b)(2) regulatory pathway for iDose as anticipated, we may need to conduct additional clinical trials, provide additional data and information and meet additional standards for regulatory approval. If this were to occur, the time and financial resources required to obtain FDA approval would likely substantially increase. Moreover, the inability to pursue the 505(b)(2) regulatory pathway could result in new competitive products reaching the market faster than our product candidate, which could materially adversely impact our competitive position and prospects. In addition, circumstances could change that would render a 505(b)(2) application for the product no longer appropriate. Even if we are allowed to pursue the 505(b)(2) regulatory pathway for iDose, we cannot assure you that we will receive the requisite or timely approvals for commercialization of this product candidate.

Failure to comply with post‑marketing regulatory requirements could subject us to enforcement actions, including substantial penalties, and might require us to recall or withdraw a product from the market.

Once a medical device is approved, a manufacturer must notify the FDA of any modifications to the device. Any modification to a device that has received FDA clearance or approval that could significantly affect its safety or effectiveness, or that would constitute a major change in its intended use, design or manufacture, requires premarket clearance or approval from the FDA pursuant to a new 510(k) clearance or approval of a PMA supplement. The FDA requires every manufacturer to make the determination in the first instance regarding whether a modification to a cleared or approved device necessitates the filing of a new 510(k) notification or PMA supplement. The FDA may review any manufacturer’s decision and can disagree. If the FDA disagrees with any future determination by us that a new clearance

or approval is not required, we may need to cease marketing or to recall the modified product until and unless we obtain clearance or approval. In addition, we could also be subject to significant regulatory fines or penalties. Any of these outcomes could harm our business.

A manufacturer must also submit periodic reports to the FDA as a condition of PMA approval. These reports include safety and effectiveness information about the device after its approval. Failure to submit such reports, or failure to submit the reports in a timely manner, could result in enforcement action by the FDA. Following its review of the periodic reports, the FDA might ask for additional information or initiate further investigation.

The PMA approval for the iStent is subject to several conditions of approval, including postmarket study and registry study requirements. Failure to comply with the conditions of approval could result in the withdrawal of PMA approval, and the inability to continue to market the device. Failure to conduct the required studies in accordance with IRB and informed consent requirements could also be grounds for withdrawal of approval of the PMA.

The regulations to which we are subject are complex and have become more stringent over time. Regulatory changes could result in restrictions on our ability to continue or expand our operations, higher than anticipated costs, or lower than anticipated sales. Even after we have obtained the proper regulatory clearance or approval to market a product, we have ongoing responsibilities under FDA regulations and applicable foreign laws and regulations. The FDA, state and foreign regulatory authorities have broad enforcement powers. Our failure to comply with applicable regulatory requirements could result in enforcement action by the FDA, state or foreign regulatory authorities, which may include any of the following sanctions:

Any of these sanctions could result in higher than anticipated costs or lower than anticipated sales and have a material adverse effect on our reputation, business, results of operations and financial condition.

We must continually monitor the performance of our products once approved and marketed for signs that their use may elicit serious and unexpected adverse effects. Any recall of our products, either voluntarily or at the direction of the FDA or another governmental authority, or the discovery of serious safety issues with our products that leads to corrective actions, could have a significant adverse impact on us.

Our ability to achieve our strategic objectives will depend, among other things, on the long‑term clinical performance of the iStent for lowering intraocular pressure in mild‑to‑moderate open‑angle glaucoma patients undergoing cataract surgery. Our original PMA approval for the iStent included several post‑marketing study requirements and future approvals may be subject to similar requirements. Failure to conduct required post‑marketing studies in a timely manner could result in the revocation of the clearance or approval for the product that is subject to such a requirement and could also result in the recall or withdrawal of the product, which would prevent us from generating sales from that product in the United States.

Although we believe follow‑up at two years continues to support efficacy and safety of the iStent for lowering intraocular pressure in mild‑to‑moderate open‑angle glaucoma patients undergoing cataract surgery, in the future, longer term study outcomes could demonstrate conflicting clinical effectiveness, a reduction of effectiveness, no clinical effectiveness or longer term safety issues with the iStent. This type of differing data could have a detrimental effect on the market penetration and usage of the iStent by customers treating mild‑to‑moderate open‑angle glaucoma and/or the risk/benefit profile of using the iStent to treat mild‑to‑moderate open‑angle glaucoma in combination with cataract surgery. As a result, our sales may decline or expected growth would be negatively impacted. This could put pressure on our ability to execute key components of our business strategy and/or negatively impact our operating condition and financial results.

More generally, all medical devices, such as the iStent, can experience performance problems that require review and possible corrective action by us or a component supplier. We cannot provide assurance that component failures, manufacturing errors, noncompliance with quality system requirements or good manufacturing practices, design defects and/or labeling inadequacies in any device or drug products that could result in an unsafe condition or injury to the patient will not occur. The FDA and similar foreign governmental authorities have the authority to require the recall of commercialized products in the event of material deficiencies or defects in design or manufacture of a product or in the event that a product poses an unacceptable risk to health. Manufacturers may also, under their own initiative, stop shipment or recall a product if any material deficiency is found or withdraw a product to improve device performance or for other reasons. A government‑mandated or voluntary recall by us or one of our distributors could occur as a result of an unacceptable risk to health, component failures, manufacturing errors, noncompliance with good manufacturing practices or quality system requirements, design or labeling defects or other deficiencies and issues. Similar regulatory agencies in other countries have similar authority to recall products because of material deficiencies or defects in design or manufacture that could endanger health. Any recall would divert management attention and financial resources, could cause the price of our stock to decline and expose us to product liability or other claims and harm our reputation with customers. A recall involving our products could be particularly harmful to our business, financial and operating results.

The FDA requires that certain classifications of recalls be reported to the FDA within 10 working days after the recall is initiated. Notice to the FDA of a correction or removal is required when undertaken to reduce a risk to health, including when there is a reasonable probability that the product will cause serious adverse health consequences or death, or when use of the device may cause temporary or medically reversible adverse health consequences or an outcome where the probability of serious adverse health consequences is remote. In addition, companies are required to maintain certain records of corrections and removal, even if they are not reportable to the FDA or similar foreign governmental authorities. We may initiate voluntary recalls involving our products in the future that we determine do not require notification of the FDA or foreign governmental authorities. If the FDA or foreign governmental authorities disagree with our determinations, they could require us to report those actions as recalls. A future recall announcement could harm our reputation with customers and negatively affect our sales. In addition, the FDA or a foreign governmental authority could take enforcement action for failing to report the recalls when they were conducted.

In addition, under the FDA’s medical device reporting regulations, we are required to report to the FDA any incident in which our product may have caused or contributed to a death or serious injury or in which our product malfunctioned and, if the malfunction were to recur, would likely cause or contribute to death or serious injury. Repeated product malfunctions may result in a voluntary or involuntary product recall. We are subject to similar obligations in the EEA and other countries in which we market our products.

Depending on the corrective action we take to redress a product’s deficiencies or defects, the FDA or applicable foreign regulatory authority may require, or we may decide, that we will need to obtain new approvals or clearances for the device before we may market or distribute the corrected device. Seeking such approvals or clearances may delay our ability to replace the recalled devices in a timely manner. Moreover, we may face additional regulatory enforcement action, including FDA warning letters, product seizure, injunctions, administrative penalties, civil penalties or criminal fines. We may also be required to bear other costs or take other actions that may have a negative impact on our sales as well as face significant adverse publicity or regulatory consequences, which could harm our business, including our ability to market our products in the future.

Any adverse event involving our products, whether in the United States or abroad, could result in future voluntary corrective actions, such as recalls or customer notifications, or agency action, such as inspection, mandatory recall, orders of repair, replacement or refund or other enforcement action. Any corrective action, whether voluntary or

involuntary, as well as defending ourselves in a lawsuit, will require the dedication of our time and capital, distract management from operating our business and may harm our reputation and financial results.

If we or our component manufacturers fail to comply with the FDA’s Quality System Regulation or Good Manufacturing Practice regulations, our manufacturing operations could be interrupted, and our product sales and operating results could suffer.

We and some of our component manufacturers are required to comply with regulatory requirements known as the FDA’s QSR, which covers the procedures and documentation of the design, testing, production, control, quality assurance, inspection, complaint handling, recordkeeping, management review, labeling, packaging, sterilization, storage and shipping of our device products. The FDA’s cGMPs apply to the manufacture of drug substance and finished drug products. The FDA audits compliance with these regulatory requirements through periodic announced and unannounced inspections of manufacturing and other facilities. The FDA may conduct inspections or audits at any time, and we and some of our component suppliers are subject to such inspections. Although we believe our manufacturing facilities and those of our critical component suppliers are in compliance with the QSR requirements, and with applicable cGMPs for our iDose drug delivery implant, we cannot provide assurance that any future inspection will not result in adverse findings. If our manufacturing facilities or those of any of our component suppliers are found to be in violation of applicable laws and regulations, or we or our suppliers have significant noncompliance issues or fail to timely and adequately respond to any adverse inspectional observations or product safety issues, or if any corrective action plan that we or our suppliers propose in response to observed deficiencies is not sufficient, the FDA could take enforcement action, including any of the following sanctions:

Any of these sanctions could adversely affect our business, financial conditions and operating results.

Outside the United States, our products and operations are also often required to comply with standards set by industrial standards bodies, such as the ISO. Foreign regulatory bodies may evaluate our products or the testing that our products undergo against these standards. The specific standards, types of evaluation and scope of review differ among foreign regulatory bodies. If we fail to adequately comply with any of these standards, a foreign regulatory body may take adverse actions similar to those within the power of the FDA. Any such action may harm our reputation and could have an adverse effect on our business, results of operations and financial condition.

If we fail to obtain and maintain regulatory approval in foreign jurisdictions, our market penetration opportunities will be limited.

The iStent is currently approved for sale in 27 countries outside of the United States, where it is sold through a direct sales network in Germany as well as distributors in other countries. In order to market our products in the European Union, Asia or other foreign jurisdictions, we must obtain and maintain separate regulatory approvals and comply with numerous and varying regulatory requirements. The approval procedure varies from country to country and can involve additional testing. The time required to obtain approval abroad may be longer than the time required to obtain FDA clearance or approval. Foreign regulatory approval processes include many of the risks associated with obtaining FDA clearance or approval and we may not obtain foreign regulatory approvals on a timely basis, if at all. FDA clearance or approval does not ensure approval by regulatory authorities in other countries, and approval by one

foreign regulatory authority does not ensure approval by regulatory authorities in other foreign countries. However, the failure to obtain clearance or approval in one jurisdiction may have a negative impact on our ability to obtain clearance or approval elsewhere. If we do not obtain or maintain necessary approvals to commercialize our products in markets outside the United States, it would negatively affect our overall market penetration.

We may be subject to fines, penalties, injunctions or other enforcement actions if we are determined to be promoting the use of our products for unapproved or “off‑label” uses, resulting in damage to our reputation and business.

Our promotional materials and training methods must comply with FDA and other applicable laws and regulations, including the prohibition of the promotion of a drug or medical device for a use that has not been cleared or approved by the FDA. Use of a drug or device outside of its cleared or approved indications is known as “off‑label” use. Physicians may use our products off‑label, as the FDA does not restrict or regulate a physician’s choice of treatment within the practice of medicine. However, if the FDA determines that our promotional materials or training constitutes promotion of an off‑label use, it could request that we modify our training or promotional materials or subject us to regulatory or enforcement actions, including the issuance of warning letters, untitled letters, fines, penalties, consent decrees, injunctions, or seizures, which could have an adverse impact on our reputation and financial results. We could also be subject to enforcement action under other federal or state laws, including the federal FCA.

Failure to comply with the Federal Health Insurance Portability and Accountability Act of 1996, the Health Information Technology for Economic and Clinical Health Act, and implementing regulations affecting the transmission, security and privacy of health information could result in significant penalties.

Numerous federal and state laws and regulations, including the Federal Health Insurance Portability and Accountability Act of 1996, or HIPAA, and the Health Information Technology for Economic and Clinical Health Act, or HITECH Act, govern the collection, dissemination, security, use and confidentiality of patient‑identifiable health information. HIPAA and the HITECH Act may require us to comply with standards for the use and disclosure of health information within our company and with third parties. The Privacy Standards and Security Standards under HIPAA establish a set of basic national privacy and security standards for the protection of individually identifiable health information by health plans, healthcare clearinghouses and certain healthcare providers, referred to as covered entities, and the business associates with whom such covered entities contract for services. Notably, whereas HIPAA previously directly regulated only these covered entities, the HITECH Act, which was signed into law as part of the stimulus package in February 2009, makes certain of HIPAA’s privacy and security standards also directly applicable to covered entities’ business associates. As a result, both covered entities and business associates are now subject to significant civil and criminal penalties for failure to comply with the Privacy Standards and Security Standards.

HIPAA and the HITECH Act also include standards for common healthcare electronic transactions and code sets, such as claims information, plan eligibility and payment information. Covered entities, such as healthcare providers, are required to conform to such transaction set standards pursuant to HIPAA.

HIPAA requires healthcare providers to develop and maintain policies and procedures with respect to protected health information that is used or disclosed, including the adoption of administrative, physical and technical safeguards to protect such information. The HITECH Act expands the notification requirement for breaches of patient‑identifiable health information, restricts certain disclosures and sales of patient‑identifiable health information and provides a tiered system for civil monetary penalties for HIPAA violations. The HITECH Act also increased the civil and criminal penalties that may be imposed against covered entities, business associates and possibly other persons and gave state attorneys general new authority to file civil actions for damages or injunctions in federal courts to enforce the federal HIPAA laws and seek attorney fees and costs associated with pursuing federal civil actions. Additionally, certain states have adopted comparable privacy and security laws and regulations, some of which may be more stringent than HIPAA.

If we do not comply with applicable existing or new laws and regulations related to patient health information, we could be subject to criminal or civil sanctions. New health information standards, whether implemented pursuant to HIPAA, the HITECH Act, congressional action or otherwise, could have a significant effect on the manner in which we handle healthcare‑related data and the cost of complying with these standards could be significant.

The 2013 final HITECH Act omnibus rule modified the breach reporting standard in a manner that will likely make more data security incidents qualify as reportable breaches. Any liability from a failure to comply with the applicable requirements of HIPAA or the HITECH Act could adversely affect our financial condition. The costs of

complying with privacy and security‑related legal and regulatory requirements are burdensome and could have a material adverse effect on our results of operations. These provisions, as modified, will be subject to interpretation by various courts and other governmental authorities, thus creating potentially complex compliance issues for us, as well as our clients and strategic partners. In addition, we are unable to predict what changes to the HIPAA Privacy Standards and Security Standards might be made in the future or how those changes could affect our business. Any new legislation or regulation in the area of privacy and security of personal information, including personal health information, could also adversely affect our business operations.

If we fail to comply with state and federal healthcare regulatory laws, we could face substantial penalties, damages, fines, disgorgement, exclusion from participation in governmental healthcare programs, and the curtailment of our operations, any of which could adversely affect our business, operations, and financial condition.

Although we do not provide healthcare services, submit claims for third‑party reimbursement, or receive payments directly from Medicare, Medicaid or other third‑party payors for our products, we are subject to healthcare fraud and abuse regulation and enforcement by federal and state governments, which could significantly impact our business. The laws that may affect our ability to operate include, but are not limited to:

Further, the PPACA, among other things, amended the intent requirements of the federal Anti‑Kickback Statute and certain criminal statutes governing healthcare fraud. A person or entity can now be found guilty of violating the statute without actual knowledge of the statute or specific intent to violate it. In addition, PPACA provided that the government may assert that a claim including items or services resulting from a violation of the federal Anti‑Kickback Statute constitutes a false or fraudulent claim for purposes of the FCA. Moreover, while we do not submit claims and our customers make the ultimate decision on how to submit claims, from time to time, we may provide reimbursement guidance to our customers. If a government authority were to conclude that we provided improper advice to our customers or encouraged the submission of false claims for reimbursement, we could face action against us by government authorities. Any violations of these laws, or any action against us for violation of these laws, even if we successfully defend against it, could result in a material adverse effect on our reputation, business, results of operations and financial condition.

We have entered into consulting and scientific advisory board arrangements with physicians and other healthcare providers, including some who influence the ordering of and use of our products in procedures they perform. Compensation for some of these arrangements includes the provision of stock options. In addition, in connection with our clinical trial recruitment activities, we have entered into compensation arrangements with some of the physicians who recruit subjects to our clinical trials. While we believe we are in material compliance with applicable laws, because of the complex and far‑reaching nature of these laws, regulatory agencies may view these transactions as prohibited arrangements that must be restructured, or discontinued, or that affect our ability to use all of the data from the clinical trial to support our marketing applications, or for which we could be subject to other significant penalties. We could be adversely affected if regulatory agencies interpret our financial relationships with providers who influence the ordering of and use our products to be in violation of applicable laws.

The scope and enforcement of each of these laws is uncertain and subject to rapid change in the current environment of healthcare reform, especially in light of the lack of applicable precedent and regulations. Federal and state enforcement bodies have recently increased their scrutiny of interactions between healthcare companies and healthcare providers, which has led to a number of investigations, prosecutions, convictions and settlements in the healthcare industry. Responding to investigations can be time‑ and resource‑consuming and can divert management’s attention from the business. Additionally, as a result of these investigations, healthcare providers and entities may have to agree to additional onerous compliance and reporting requirements as part of a consent decree or corporate integrity agreement. Any such investigation or settlement could increase our costs or otherwise have an adverse effect on our business.

If our operations are found to be in violation of any of the laws described above or any other government regulations that apply to us, we may be subject to penalties, including civil and criminal penalties, damages, fines, disgorgement, imprisonment, exclusion from participation in federal and state healthcare programs and the curtailment or restricting of our operations, any of which could harm our ability to operate our business and our financial results.

Foreign governments tend to impose strict price controls, which may adversely affect our future profitability.

We currently sell the iStent and iStent Inject outside the United States and we plan to further expand our international operations. In some foreign countries, particularly in the European Union, the pricing of medical devices is subject to governmental control. In these countries, pricing negotiations with governmental authorities can take considerable time after the receipt of marketing approval for a product. To obtain reimbursement or pricing approval in some countries, we may be required to supply data that compares the cost‑effectiveness of our products to other available therapies. If reimbursement of our products is unavailable or limited in scope or amount, or if pricing is set at unsatisfactory levels, it may not be profitable to sell our products in certain foreign countries, which could negatively affect the long‑term growth of our business.

Our financial performance may be affected by medical device tax provisions in the healthcare reform laws.

The PPACA imposes among other things, an excise tax of 2.3% on any entity that manufactures or imports medical devices offered for sale in the United States beginning in 2013. Under these provisions, the Congressional Research Services predicted that the total cost to the medical device industry may be up to $29 billion over the next

decade. The iStent has been subject to this tax and the other products in our pipeline potentially will be subject to this tax.

On December 18, 2015, the President signed into law the PATH Act, which includes a two‑year moratorium on the medical device excise tax. This Act amends the Internal Revenue Code to exempt medical device sales during the period of January 1, 2016 to December 31, 2017. Absent further legislation, the tax will be automatically reinstated for medical device sales starting on January 1, 2018.

There are no assurances that our business will not be materially adversely affected by the current, or possible future additional tax, provisions implemented under healthcare reform or appropriate legislation.

Our operations involve hazardous materials, and we must comply with environmental laws and regulations, which can be expensive.

We are subject to a variety of federal, state and local regulations relating to the use, handling, storage, disposal, and human exposure to hazardous and toxic materials. We could incur costs, fines, and civil and criminal sanctions, third‑party property damage or personal injury claims, or could be required to incur substantial investigation or remediation costs, if we were to violate or become liable under environmental laws. Compliance with current or future environmental and safety laws and regulations could restrict our ability to expand our facilities, impair our research, development or production efforts, or require us to incur other significant expenses. There can be no assurance that violations of environmental laws or regulations will not occur in the future as a result of the inability to obtain permits, human error, accident, equipment failure or other causes.

Risks Related to Our Intellectual Property

If we are unable to adequately protect our intellectual property, our competitors and other third parties could develop and commercialize products similar or identical to ours, which would substantially impair our ability to compete.

Our success and ability to compete depends significantly upon our ability to maintain and protect our proprietary rights to the technologies and inventions used in or embodied by our products. We rely on a combination of patents and trademark rights, and to a lesser extent on trade secrets and copyrights, together with licenses and nondisclosure agreements to protect our intellectual property. These legal means, however, afford only limited protection and may not adequately protect our intellectual property rights. We also have not pursued or maintained, and may not pursue or maintain in the future, patent protection for our products in every country or territory in which we sell or will in the future sell our products. In addition, we cannot be sure that any of our pending patent applications or pending trademark applications will issue or that, if issued, they will issue in a form that will be advantageous to us. The United States Patent and Trademark Office, or USPTO, or other foreign patent offices may deny or significantly narrow claims made under our patent applications and our issued patents may be successfully challenged, may be designed around, or may otherwise be of insufficient scope to provide us with any meaningful protection for our present or future commercial products. Further, the USPTO or other foreign trademark offices may deny our trademark applications and, even if published or registered, these trademarks may be ineffective in protecting our brand and goodwill and may be successfully opposed or challenged.

The patent prosecution process itself is expensive and time consuming, and we may not be able to file and prosecute all necessary or desirable patent applications at a reasonable cost or in a timely manner. The patent prosecution process requires compliance with complex laws, rules and regulations imposed by patent authorities. Failure to comply with these laws, rules and regulations may derive, among other bases, from various defects of form in the preparation or filing of our patents or patent applications, which may include defects that relate to our making proper priority claims and inventorship determinations. If any such defects are identified, we may need to take corrective action. For example, we have filed petitions with the USPTO to request in part that Dr. Richard Hill, one of our consultants, be added as an inventor on patents related to our iStent and iStent Inject products and iStent Supra product candidate that were developed during Dr. Hill’s consultancy. Dr. Hill has assigned his rights in these patents and certain other patent applications to us pursuant to the terms of his consulting agreement. We cannot assure you, however, that our petitions to the USPTO will be successful. Dr. Hill was employed as an Associate Professor at the University of California, Irvine, or the University, during the period when these patents and patent applications were developed. We engaged in discussions with the University to address whether it has any ownership claim to these patents and patent applications as a result of Dr. Hill’s employment, and in December 2014, we entered into an agreement with the University pursuant to which the

University agreed not to challenge our ownership of these patents and patent applications. In addition, if any material defects are found in the form or preparation of any of our patents or patent applications, such patents or applications may be invalid and unenforceable. Any of these outcomes could impair our ability to prevent competition from third parties, which could harm our business. Moreover, the USPTO and various foreign governmental patent agencies require compliance with a number of procedural, documentary, fee payment and other similar provisions during the patent application process. In addition, periodic maintenance fees on issued patents often must be paid to the USPTO and foreign patent agencies over the lifetime of the patent. Noncompliance with these requirements can result in abandonment or lapse of the patent or patent application, resulting in partial or complete loss of patent rights in the relevant jurisdiction. If we fail to maintain the patents and patent applications covering our products or procedures, we may not be able to stop a competitor from marketing products that are the same as or similar to our products, which would have a material adverse effect on our business.

The patent position of medical device companies is generally highly uncertain, involves complex legal and factual questions and has in recent years been the subject of much litigation. In the United States and in many foreign jurisdictions, policies regarding the breadth of claims allowed in patents can be inconsistent. The U.S. Supreme Court and the Court of Appeals for the Federal Circuit have made, and will likely continue to make, changes in how the patent laws of the United States are interpreted. Similarly, foreign courts have made, and will likely continue to make, changes in how the patent laws in their respective jurisdictions are interpreted. We cannot predict future changes in the interpretation of patent laws or changes to patent laws that might be enacted into law by U.S. and foreign legislative bodies. Those changes may materially affect our patents or patent applications and our ability to obtain patents. Future protection for our proprietary rights is uncertain because legal means afford only limited protection and may not adequately protect our rights or permit us to gain or keep our competitive advantage, which could adversely affect our business, financial condition and results of operations.

Patent reform legislation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents. On September 16, 2011, the Leahy‑Smith America Invents Act, or the Leahy‑Smith Act, was signed into law. The Leahy‑Smith Act includes a number of significant changes to U.S. patent law. These include provisions that affect the way patent applications are prosecuted, redefine prior art, may affect patent litigation, and switch the U.S. patent system from a “first‑to‑invent” system to a “first‑to‑file” system. Under a “first‑to‑file” system, assuming the other requirements for patentability are met, the first inventor to file a patent application generally will be entitled to the patent on an invention regardless of whether another inventor had made the invention earlier. The USPTO developed new regulations and procedures to govern administration of the Leahy‑Smith Act, and many of the substantive changes to patent law associated with the Leahy‑Smith Act, and in particular, the first‑to‑file provisions, only became effective on March 16, 2013. Accordingly, it is not clear what, if any, impact the Leahy‑Smith Act will have on the operation of our business. However, the Leahy‑Smith Act and its implementation could increase the uncertainties and costs surrounding the prosecution of our patent applications and the enforcement or defense of our issued patents, all of which could have a material adverse effect on our business and financial condition. In addition, patent reform legislation may pass in the future that could lead to additional uncertainties and increased costs surrounding the prosecution, enforcement, and defense of our patents and applications.

We may be subject to a third‑party preissuance submission of prior art to the USPTO or to another foreign patent office, or become involved in opposition, derivation, reexamination, inter partes review, post‑grant review, or other patent office proceedings or litigation, in the United States or elsewhere, challenging our patent rights or the patent rights of others. An adverse determination in any such submission, proceeding or litigation could reduce the scope of, or invalidate, our patent rights, allow third parties to commercialize our technology or products and compete directly with us, without payment to us, or result in our inability to manufacture or commercialize products without infringing third‑party patent rights.

We have a number of foreign patents and patent applications, and expect to pursue patent protection in the most significant markets in which we do business. The laws of other countries in which our product offerings are or may be sold may not protect our product offerings and intellectual property to the same extent as U.S. laws, if at all. Many companies have encountered significant difficulties in obtaining, protecting and defending such rights in such markets. In addition, many countries limit the enforceability of patents against other parties, including government agencies or government contractors. In these countries, the patent owner may have limited remedies, and certain countries have compulsory licensing laws under which a patent owner may be compelled to grant licenses to other parties. We also may be unable to protect our rights in trade secrets and unpatented proprietary technology in these countries. If we encounter

such difficulties or we are otherwise precluded from effectively protecting our intellectual property rights in these jurisdictions, our business, financial condition and results of operations could be substantially harmed.

Despite our efforts to safeguard our unpatented and unregistered intellectual property rights, we may not be successful in doing so, or the steps taken by us in this regard may not be adequate to detect or deter misappropriation of our technology or to prevent an unauthorized third party from copying or otherwise obtaining and using our products, technology or other information that we regard as proprietary. Moreover, our competitors may independently develop equivalent knowledge, methods and know‑how. Competitors could purchase our products and attempt to replicate some or all of the competitive advantages we derive from our development efforts, infringe our intellectual property rights, design around our protected technology or develop their own competitive technologies that fall outside of our intellectual property rights. Our inability to adequately protect our intellectual property could allow our competitors and other third parties to produce products based on our patented or proprietary technology and other intellectual property rights, which could substantially impair our ability to compete.

We may not be able to accurately estimate or control our future operating expenses in relation to obtaining, enforcing and/or defending intellectual property, which could lead to cash shortfalls. Our operating expenses may fluctuate significantly in the future as a result of the costs of preparing, filing, prosecuting, defending and enforcing patent claims and other patent related costs, including litigation costs and the results of such litigation.

We have been and may in the future become involved in patent and other intellectual property litigation or administrative proceedings to enforce or defend our intellectual property rights, which could be costly, time consuming and unsuccessful and could interfere with our ability to successfully commercialize our products.

We have asserted and may in the future need to assert claims of infringement against third parties to protect our intellectual property.

Regardless of the final outcome, any litigation to enforce our intellectual property rights in patents, copyrights, trade secrets or trademarks is highly unpredictable and could result in substantial costs and diversion of resources, which could have a material adverse effect on our business, financial condition and results of operations. Any claims we assert against alleged infringers could provoke these third parties to assert counterclaims against us alleging that we infringe their own intellectual property rights, or that our rights are invalid or unenforceable. A court could hold that some or all of our asserted intellectual property rights are not infringed, or could invalidate our rights, hold our rights unenforceable, or substantially narrow the scope of protection. Any such adverse result would undermine our competitive position. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments. If securities analysts or investors perceive these results to be negative, it could hurt the price of our common stock. Such litigation proceedings could substantially increase our operating losses and reduce the resources available for development activities or any future sales, marketing or distribution activities.

We may become subject to claims of infringement or misappropriation of the intellectual property rights of others, which could prohibit us from selling our products, require us to obtain licenses from third parties, require us to develop non‑infringing alternatives and/or subject us to substantial monetary damages and injunctive relief.

The medical device industry is characterized by the existence of a large number of patents and frequent litigation based on allegations of patent infringement. Moreover, because patent applications can take many years to issue, there may be currently pending applications, unknown to us, which may later result in issued patents that materially and adversely affect our business. Additionally, our competitors could later pursue additional patent protection related to their earlier patent disclosures, where such patent filings are prepared with intent to cover our products. Third parties could also assert infringement or misappropriation claims against us with respect to our products. Whether or not such claims are valid, we cannot be certain that we have not infringed the intellectual property rights of such third parties or others. Additionally, for business reasons, we may seek to invalidate or challenge the intellectual property rights of a third party, including those rights owned by our competitors, before any infringement assertion is made. This action could include seeking a declaration from a court that one or more of our products do not infringe one or more patents or other intellectual property rights owned by third parties.

Any infringement or misappropriation claim or validity or infringement challenge could result in significant costs, substantial damages and our inability to manufacture, market or sell our existing or future products that are found to infringe. Even if we were to prevail in any such action, the litigation could result in substantial cost and diversion of

resources that could materially and adversely affect our business. If a court determined, or if we independently discovered, that our product offerings violated third‑party proprietary rights, there can be no assurance that we would be able to re‑engineer our products to avoid those rights or to obtain a license under those rights on commercially reasonable terms, if at all. As a result, we could be prohibited from selling products that are found to infringe, or we could elect not to sell or to stop selling products that we believe have a substantial probability of infringing a third‑party’s intellectual property rights. Even if obtaining a license were feasible, it may be costly and time‑consuming. A court could also enter orders that temporarily, preliminarily or permanently enjoin us or our customers from making, using, selling, offering to sell, distributing, exporting or importing the iStent or future products, such as the iStent Inject,  iStent Supra or iDose, or could enter orders mandating that we undertake certain remedial activities. A court could also order us to pay compensatory damages for such infringement, plus prejudgment interest, and if we are found to have willfully infringed third‑party rights, could in addition treble the compensatory damages and award attorneys’ fees. These damages could be substantial and could harm our reputation, business, financial condition and results of operations.

Even if resolved in our favor, litigation or other legal proceedings relating to intellectual property claims may cause us to incur significant expenses, and could distract our technical and management personnel from their normal responsibilities. In addition, there could be public announcements of the results of hearings, motions or other interim proceedings or developments. If securities analysts or investors perceive these results to be negative, it could hurt the price of our common stock. Such litigation proceedings could substantially increase our operating losses and reduce the resources available for development activities or any future sales, marketing or distribution activities. We may not have sufficient financial or other resources to conduct such litigation or proceedings adequately. Some of our competitors may be able to sustain the costs of such litigation or proceedings more effectively than we can because of their greater financial resources. Uncertainties resulting from the initiation and continuation of patent litigation or other proceedings could compromise our ability to compete in the marketplace.

If any of our employees, consultants or others breach their proprietary information agreements, our competitive position could be harmed.