Company: STAA
Filing Date: 2025-11-17
Form Type: DEFA14A
Source: 0001193125-25-284603
Chunk: 0

Company: STAAR SURGICAL CO
Filing Date: 2025-11-17
Form: DEFA14A
Chunk 0
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UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 SCHEDULE 14A Proxy Statement Pursuant to Section 14(a) of the Securities Exchange Act of 1934 Filed by the Registrant ☒ Filed by a Party other than the Registrant ☐ Check the appropriate box:

| ☐ | Preliminary Proxy Statement |

| ☐ | Confidential, for Use of the Commission Only (as permitted by Rule 
 14a-6(e)(2))                                                       |

| ☐ | Definitive Proxy Statement |

| ☒ | Definitive Additional Materials |

| ☐ | Soliciting Material under §240.14a-12 |

STAAR SURGICAL COMPANY (Name of Registrant as Specified In Its Charter) (Name of Person(s) Filing Proxy Statement, if other than the Registrant) Payment of Filing Fee (Check the appropriate box):

| ☒ | No fee required. |

| ☐ | Fee paid previously with preliminary materials. |

| ☐ | Fee computed on table in exhibit required by Item 25(b) per Exchange Act Rules 
 14a-6(i)(1) and 0-11                                                           |

SUPPLEMENT DATED NOVEMBER 17, 2025, TO PROXY STATEMENT DATED SEPTEMBER 16, 2025

This document is a supplement dated November 17, 2025 (“Supplement”) to the proxy statement dated September 16,
2025 and first mailed to stockholders of STAAR Surgical Company (“STAAR” or the “Company”) on or about September 16, 2025. That proxy statement was supplemented by a proxy supplement dated October 13, 2025, which
was filed by STAAR with the U.S. Securities and Exchange Commission (the “SEC”) on a Current Report on Form 8-K on October 14, 2025, and a proxy supplement dated October 30, 2025, which
was filed by STAAR with the SEC on a Current Report on Form 8-K on October 30, 2025 and first mailed to STAAR stockholders on or about October 30, 2025. That proxy statement, as so supplemented, is
referred to herein as the proxy statement.

INTRODUCTION AND EXPLANATORY NOTE

Capitalized terms used herein, but not otherwise defined, shall have the meanings ascribed to such terms in the proxy statement. Except as
described in this Supplement