Exhibit 3.1

CERTIFICATE OF AMENDMENT

TO THE

AMENDED AND RESTATED

CERTIFICATE OF INCORPORATION

OF

AVINGER, INC.

Avinger, Inc., a corporation organized and existing under and by virtue of the General Corporation Law of the State of Delaware (the “Corporation”), hereby certifies as follows:

1. The name of the Corporation is Avinger, Inc., and the original Certificate of Incorporation of this Corporation was filed with the Secretary of State of the State of Delaware on March 8, 2007.

2. ARTICLE IV of the Amended and Restated Certificate of Incorporation of the Corporation is hereby amended to add the following paragraph at the end of Article IV as a new Section 4.6:

4.6 Reverse Stock Split. Upon the effectiveness of the Certificate of Amendment of the Certificate of Incorporation adding this Section 4.6 (the “Effective Time”), each three to ten shares of the Corporation's Common Stock, par value $0.001 per share, issued and outstanding immediately prior to the Effective Time shall automatically be combined into one (1) validly issued, fully paid and non-assessable share of Common Stock, par value $0.001 per share, without any further action by the Corporation or the holder thereof, the exact ratio within the three to ten range to be determined by the Board of Directors of the Corporation prior to the Effective Time and publicly announced by the Corporation, subject to the treatment of fractional share interests as described below (such combination, the “Reverse Stock Split”). No fractional shares will be issued in connection with the Reverse Stock Split. Stockholders who would otherwise be entitled to receive fractional shares will, in lieu thereof, be entitled to receive a cash payment equal to the product obtained by multiplying (i) the closing sales price of the Common Stock on the NASDAQ Capital Market on the effective date of the Reverse Stock Split by (ii) the number of shares of Common Stock held by such stockholder before the Reverse Stock Split that would otherwise have been exchanged for a fractional share;  provided, that where shares are held in certificated form, the surrender of a stockholder’s Old Certificates (as defined below) will be required. Each certificate that immediately prior to the Effective Time represented shares of Common Stock (“Old Certificates”) shall thereafter represent that number of shares of Common Stock into which the shares of Common Stock represented by the Old Certificate shall have been combined, subject to the treatment of fractional share interests as described above.

3. On June 19, 2019, the Board of Directors of the Corporation determined that each ten (10) shares of the Corporation's Common Stock, par value $0.001 per share, issued and outstanding immediately prior to the Effective Time shall automatically be combined into one (1) validly issued, fully paid and non-assessable share of Common Stock, par value $0.001 per share. The Corporation publicly announced this ratio on June 21, 2019.

4. The foregoing amendment has been duly approved by the board of directors of the Corporation in accordance with the provisions of Section 242 of the General Corporation Law of the State of Delaware.

5. The foregoing amendment has been duly approved by the stockholders of the Corporation in accordance with the provisions of Section 242 of the General Corporation Law of the State of Delaware.

6. This Certificate of Amendment shall become effective at 5:00 p.m. Eastern time on June 21, 2019.

IN WITNESS WHEREOF, the Corporation has caused this Certificate of Amendment to be executed by a duly authorized officer of the Corporation as of June 21, 2019.

AVINGER, INC.

By:   /s/ Jeffrey M. Soinski                                 

       Jeffrey M. Soinski

       President and Chief Executive Officer