UNITED STATES
                             Washington, D.C. 20549

                                    FORM 8-K

                                 Current Report
                     Pursuant to Section 13 or 15(d) of the
                         Securities Exchange Act of 1934

        Date of Report (Date of Earliest Event Reported): April 19, 2005

                               COGNEX CORPORATION
             (Exact name of registrant as specified in its charter)

         Massachusetts                   0-17869               04-2713778
         -------------                   -------               ----------
(State or other jurisdiction of  (Commission File Number)   (I.R.S. Employer
 incorporation or organization)                           Identification No.)

                                One Vision Drive
                        Natick, Massachusetts 01760-2059
          (Address, including zip code, of principal executive offices)

                                 (508) 650-3000
              (Registrant's telephone number, including area code)

          (Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to
simultaneously satisfy the filing obligation of the registrant under any of the
following provisions:

        |_| Written communications pursuant to Rule 425 under the Securities Act
           (17 CFR 230.425)
        |_| Soliciting material pursuant to Rule 14a-12 under the Exchange Act
           (17 CFR 240.14a-12)
        |_| Pre-commencement communications pursuant to Rule 14d-2(b) under the
            Exchange Act (17 CFR 240.14d-2(b))
        |_| Pre-commencement communications pursuant to Rule 13e-4(c) under the
            Exchange Act (17 CFR 240.13e-4(c))


Item 2.02         Results of Operations and Financial Condition

On April 19, 2005, Cognex Corporation issued a news release to report its
financial results for the first quarter ended April 3, 2005. The release is
furnished as Exhibit 99.1 hereto. The information in this Current Report on Form
8-K, including the Exhibit attached hereto, shall not be deemed "filed" for
purposes of Section 18 of the Securities Exchange Act of 1934, nor shall it be
deemed to be incorporated by reference in any filing under the Securities Act of
1933 or the Securities Exchange Act of 1934, regardless of any general
incorporation language in such filing.

Item 9.01         Financial Statements and Exhibits

(c)      Exhibits

Exhibit No.       Description
-----------       -----------

99.1              News release, dated April 19, 2005, by Cognex Corporation


Pursuant to the requirements of the Securities Exchange Act of 1934, as
amended, the registrant has duly caused this report to be signed on its behalf
by the undersigned hereunto duly authorized.

                                  COGNEX CORPORATION

Dated: April 19, 2005             By: /s/ Richard A. Morin
                                      Richard A. Morin
                                      Senior Vice President of Finance,
                                      Chief Financial Officer and Treasurer