Exhibit 99.1

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Kala Pharmaceuticals Reports Fourth Quarter and Full Year 2022 Financial Results and Provides Corporate Update

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-- Enrolled first patient in CHASE Phase 2b clinical trial evaluating KPI-012 for PCED; Top-line data targeted for 1Q 2024 --

-- Closed $31.0 million private placement financing, extending cash runway into 1Q 2025 --

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ARLINGTON, Mass, March 3, 2023 — Kala Pharmaceuticals, Inc. (NASDAQ:KALA), a clinical-stage biopharmaceutical company dedicated to the research, development and commercialization of innovative therapies for rare and severe diseases of the eye, today reported financial results for the fourth quarter and full year ended December 31, 2022 and provided a corporate update.

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“2022 was a transformational year for Kala. In the third quarter, we completed the sale of EYSUVIS® and INVELTYS® to Alcon Inc., enabling us to devote our full attention to developing innovative therapies, including KPI-012, for rare and severe eye diseases,” said Mark Iwicki, Chief Executive Officer and Chairman of Kala Pharmaceuticals. “In the months since, we made great progress advancing KPI-012 for the treatment of persistent corneal epithelial defect (PCED), a rare and debilitating ocular condition. We recently enrolled the first patient in our CHASE Phase 2b clinical trial of KPI-012, potentially the first of two pivotal studies required to support an application for marketing approval in the United States, and we are targeting top-line safety and efficacy data in the first quarter of 2024. In addition, following the completion of our $31.0 million private placement financing in the fourth quarter of 2022 and coupled with our streamlined corporate structure, we are operating from a position of financial strength, with capital well beyond the anticipated readout from the CHASE trial.”

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Fourth Quarter and Recent Business Highlights:

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Development-Stage Pipeline:

In February 2023, Kala dosed the first patient in its CHASE (Corneal Healing After SEcretome therapy) Phase 2b clinical trial evaluating KPI-012 for PCED in the United States. The CHASE Phase 2b clinical trial is a multicenter, randomized, double-masked, vehicle-controlled, parallel-group study to evaluate the safety and efficacy of two doses of KPI-012 ophthalmic solution (3 U/mL and 1 U/mL) compared to vehicle when dosed topically four times per day (QID) for 56 days. After the first cohort with two initial patients to evaluate the safety of the high dose, patients in the second cohort will be randomized to treatment with either KPI-012 or vehicle. The trial is expected to enroll approximately 90 adult patients with PCED, and the primary endpoint of the trial is the complete healing of the PCED as measured by corneal fluorescein staining. Kala is targeting top-line safety and efficacy data from the CHASE Phase 2b clinical trial in the first quarter of 2024. If the results are positive, and subject to discussions with regulatory authorities, Kala believes this trial could serve as the first of two pivotal trials required to support the submission of a Biologics License Application (BLA) to the U.S. Food and Drug Administration (FDA). Kala has received Orphan Drug Designation from the FDA for KPI-012 for the treatment of PCED.

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Kala believes the multifactorial mechanism of action of KPI-012 makes it a platform technology and is evaluating the potential development of KPI-012 for additional rare, front-of-the-eye diseases, such as Limbal Stem Cell Deficiency and ocular manifestations of moderate-to-severe Sjögren’s. Kala has also initiated preclinical studies for its KPI-014 program, evaluating the utility of its mesenchymal stem cell secretome (MSC-S) platform for inherited retinal degenerative diseases such as Retinitis Pigmentosa and Stargardt Disease.

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Corporate Updates:

In December 2022, Kala closed a private placement financing, raising aggregate gross proceeds of $31.0 million. Under the terms of the private placement, Kala sold an aggregate of 76,813 shares of its common stock at a price of $5.75 per share and an aggregate of 53,144 shares of its Series E Convertible Non-Redeemable Preferred Stock at a price of $575.00 per share to a life sciences-focused investor.

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Financial Results:

The financial results below contain both GAAP and non-GAAP financial measures. The non-GAAP financial measures exclude stock-based compensation expense, non-cash interest expense, depreciation and amortization, acquired in-process research and development (IPR&D) expense, transaction costs related to the Alcon, Inc. (Alcon) and Combangio, Inc. (Combangio) transactions, gain or loss on fair value remeasurement of deferred purchase and contingent consideration, gain on sale of the commercial business, loss on extinguishment of debt, the impact of the termination of the lease for the Company’s former corporate headquarters and other non-cash expenses. See “Non-GAAP Financial Measures” below; for a full reconciliation of Kala’s GAAP to non-GAAP financial measures, please refer to the tables at the end of this press release.

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Fourth Quarter 2022 Financial Results:

diluted basis, for the same period in 2021. Non-GAAP net loss was $10.4 million for the quarter ended December 31, 2022, compared to $24.6 million for the same period in 2021. The weighted average number of shares used to calculate net loss per share was 1.6 million for the quarter ended December 31, 2022, and 1.4 million for the quarter ended December 31, 2021. On October 20, 2022, Kala effected a reverse stock split of its outstanding common stock at a ratio of 1 post-split share for every 50 pre-split shares. Proportional adjustments were also made to the number of shares of Kala’s common stock issuable upon exercise or conversion of Kala’s equity awards and warrants, as well as the applicable exercise prices. The weighted average number of shares used to calculate net loss has been retroactively adjusted for all periods presented in this press release to reflect the reverse stock split.

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Financial Results for Full Year ended December 31, 2022:

weighted average number of shares used to calculate net loss per share was 1.5 million for the full year ended December 31, 2022, and 1.3 million for the full year ended December 31, 2021. On October 20, 2022, Kala effected a reverse stock split of its outstanding common stock at a ratio of 1 post-split share for every 50 pre-split shares. Proportional adjustments were also made to the number of shares of Kala’s common stock issuable upon exercise or conversion of Kala’s equity awards and warrants, as well as the applicable exercise price. The weighted average number of shares used to calculate net loss has been retroactively adjusted for all periods presented in this press release to reflect the reverse stock split.

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Non-GAAP Financial Measures:

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In this press release, the financial results of Kala are provided in accordance with accounting principles generally accepted in the United States (GAAP) and using certain non-GAAP financial measures. The items included in GAAP presentations but excluded for purposes of determining non-GAAP financial measures for the periods presented in this press release are stock-based compensation expense, non-cash interest expense, depreciation and amortization, acquired in-process research and development expense, transaction costs related to the Alcon and Combangio transactions, gain or loss on fair value remeasurement of deferred purchase consideration and contingent consideration, gain on sale of the commercial business, loss on extinguishment of debt, the impact of the termination of the lease for the Company’s former corporate headquarters and other non-cash expenses. Management believes this non-GAAP information is useful for investors, taken in conjunction with Kala’s GAAP financial statements, because it provides greater transparency and period-over-period comparability with respect to Kala’s operating performance. These measures are also used by management to assess the performance of the business. Investors should consider these non-GAAP measures only as a supplement to, not as a substitute for, or as superior to, measures of financial performance prepared in accordance with GAAP. In addition, these non-GAAP financial measures are unlikely to be comparable with non-GAAP information provided by other companies. For a reconciliation of these non-GAAP financial measures to the most comparable GAAP measures, please refer to the table at the end of this press release.

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About Kala Pharmaceuticals, Inc.

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Kala is a clinical-stage biopharmaceutical company dedicated to the research, development and commercialization of innovative therapies for rare and severe diseases of the eye. Kala’s biologics-based investigational therapies utilize Kala’s proprietary mesenchymal stem cell secretome (MSC-S) platform. Kala’s lead product candidate, KPI-012, is a human MSC-S, which contains numerous human-derived biofactors, such as growth factors, protease inhibitors, matrix proteins and neurotrophic factors that can potentially correct the impaired corneal healing that is an underlying etiology of multiple severe ocular diseases. KPI-012 is currently in clinical development for the treatment of persistent corneal epithelial defect (PCED), a rare disease of impaired corneal healing, for which it has received orphan drug designation from the U.S. Food and Drug Administration. Kala is also targeting the potential development of KPI-012 for the treatment of Limbal Stem Cell Deficiency and ocular manifestations of moderate-to-severe Sjögren's and has initiated preclinical studies to evaluate the potential utility of its MSC-S platform for inherited retinal degenerative diseases, such as Retinitis Pigmentosa and Stargardt Disease. For more information on Kala, please visit www.kalarx.com.

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Forward Looking Statements:

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This press release contains forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that involve substantial risks and uncertainties. Any statements in this press release about Kala’s future expectations, plans and prospects, including but not limited to statements about Kala’s expectations with respect to potential advantages of KPI-012 and its MSC-S platform; anticipated timelines to report topline data for the CHASE Phase 2b clinical trial of KPI-012; the design of the CHASE Phase 2b clinical trial; Kala’s belief that the Chase Phase 2b trial could serve as the first of two pivotal trials required to support the submission of a BLA to the FDA; the clinical utility of KPI-012 for PCED; Kala’s plans to pursue research and development of KPI-012 and its MSC-S platform for other indications and to apply for RMAT designation; the sufficiency of Kala’s existing cash resources for the period anticipated; and other statements containing the words “anticipate,” “believe,” “estimate,” “expect,” “intend,” “may,” “plan,” “predict,” “project,” “target,” “potential,” “likely,” “will,” “would,” “could,” “should,” “continue,” and similar expressions constitute forward-looking statements. Actual results may differ materially from those indicated by such

forward-looking statements as a result of various important factors, including: uncertainties inherent in the initiation and conduct of preclinical studies and clinical trials; uncertainties regarding availability and timing of data from clinical trials; whether results of early clinical trials or trials in different disease indications will be indicative of the results of ongoing or future trials; whether results of the Phase 1b clinical trial of KPI-012 will be indicative of results for any future clinical trials and studies of KPI-012, including the planned Phase 2b clinical trial; uncertainties associated with regulatory review of clinical trials and applications for marketing approvals; Kala’s ability to retain and hire key personnel; the impact of extraordinary external events, such as the current pandemic health event resulting from the coronavirus (COVID-19), and their collateral consequences; the sufficiency of cash resources and need for additional financing and other important factors, any of which could cause the Kala’s actual results to differ from those contained in the forward-looking statements, discussed in the “Risk Factors” section of Kala’s Annual Report on Form 10-K, most recently filed Quarterly Report on Form 10-Q and other filings Kala makes with the Securities and Exchange Commission. These forward-looking statements represent Kala’s views as of the date of this press release and should not be relied upon as representing Kala’s views as of any date subsequent to the date hereof. Kala does not assume any obligation to update any forward-looking statements, whether as a result of new information, future events or otherwise, except as required by law.

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Investor Contact:

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Hannah Deresiewicz

hannah.deresiewicz@sternir.com

212-362-1200

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Financial Tables:

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Kala Pharmaceuticals, Inc.

Balance Sheet Data

(in thousands)

(unaudited)

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Kala Pharmaceuticals, Inc.

Consolidated Statement of Operations

(In thousands, except share and per share data)

(Unaudited)

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Kala Pharmaceuticals, Inc.

Reconciliation of GAAP to non-GAAP Financial Measures

(In thousands)

(Unaudited)

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