UNITED STATES
                       SECURITIES AND EXCHANGE COMMISSION
                              Washington, DC 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 20, 2005



                              CORNING INCORPORATED
                     INVESTMENT PLAN FOR UNIONIZED EMPLOYEES
             (Exact name of registrant as specified in its charter)



New York                                 1-3247             16-0393470
(State or other jurisdiction             (Commission        (I.R.S. Employer
of incorporation)                        File Number)       Identification No.)


One Riverfront Plaza, Corning, New York                     14831
(Address of principal executive offices)                    (Zip Code)


(607) 974-9000
(Registrant's telephone number, including area code)


N/A
(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 4.01.  Changes in Registrant's Certifying Accountant.

Item 4.01(a) - former independent registered public accounting firm
-------------------------------------------------------------------

On April 20, 2005, the Benefits Committee of the Corning Incorporated Investment
Plan  for   Unionized   Employees   (the  "Plan")   approved  the  dismissal  of
PricewaterhouseCoopers  LLP as the independent registered public accounting firm
for the Plan.

The report of PricewaterhouseCoopers LLP on the financial statements of the Plan
for the years ended December 31, 2003 and 2002  contained no adverse  opinion or
disclaimer  of  opinion,  and such  report was not  qualified  or modified as to
uncertainty, audit scope or accounting principle.

During the years ended  December  31, 2003 and 2002 and through  April 20, 2005,
there were no disagreements  with  PricewaterhouseCoopers  LLP on any accounting
principles or practices,  financial  statement  disclosure or auditing  scope or
procedure,  which  disagreements,   if  not  resolved  to  the  satisfaction  of
PricewaterhouseCoopers  LLP, would have caused it to make  reference  thereto in
connection with its report on the Plan's financial statements for such years.

No  reportable  event  as  described  in  paragraph  (a)(1)(v)  of  Item  304 of
Regulation  S-K has occurred  during the years ended  December 31, 2003 and 2002
and through April 20, 2005.

The Benefits  Committee of the Plan  requested that  PricewaterhouseCoopers  LLP
furnish it with a letter addressed to the United States  Securities and Exchange
Commission stating whether or not it agrees with the above statements. A copy of
such letter, dated May 2, 2005, is filed as Exhibit 16 to this Form 8-K.

Item 4.01(b) - new independent registered public accounting firm
----------------------------------------------------------------

On  April  20,  2005,  the  Benefits  Committee  of the Plan  appointed  Insero,
Kasperski,  Ciaccia & Co., P.C. as the independent  registered public accounting
firm of the Plan for the year ended December 31, 2004.

The  Benefits  Committee  of the Plan did not consult  with  Insero,  Kasperski,
Ciaccia & Co.,  P.C.  during the years ended  December  31,  2003 and 2002,  and
through April 20, 2005, on any matter which was the subject of any  disagreement
or any  reportable  event as defined in Regulation  S-K Item  304(a)(1)(iv)  and
Regulation  S-K  Item  304(a)(1)(v),  respectively,  or on  the  application  of
accounting principles to a specified transaction,  either completed or proposed,
or the type of audit  opinion  that might be  rendered  on the Plan's  financial
statements,  relating  to which  either a written  report  was  provided  to the
Benefits  Committee  of the  Plan or  oral  advice  was  provided  that  Insero,
Kasperski,  Ciaccia & Co., P.C.  concluded was an important factor considered by
the Benefits  Committee of the Plan in reaching a decision as to the accounting,
auditing or financial reporting issue.


Item 9.01.  Financial Statements and Exhibits.

(c)      Exhibit

            Exhibit 16: Letter from Registrant's prior independent accountants.





                                   SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the
Benefits Committee has duly caused this report to be signed on its behalf by the
undersigned thereunto duly authorized.



                               CORNING INCORPORATED
                               INVESTMENT PLAN FOR UNIONIZED EMPLOYEES
                               Registrant



Date: May 2, 2005              By   /s/     DEBORAH G. LAUPER                
                                            ---------------------------------
                                            Deborah G. Lauper
                                            Chair
                                            Benefits Committee






                                                                      Exhibit 16
                                                                      ----------


May 2, 2005

Securities and Exchange Commission
450 Fifth Street, N.W.
Washington, D.C. 20549

Commissioners:

We have read the statements made by the Corning Incorporated Investment Plan for
Unionized  Employees (the "Plan") (copy  attached),  which we understand will be
filed with the United States  Securities  and Exchange  Commission,  pursuant to
Item 4.01 of Form 8-K,  as part of the Plan's  Form 8-K report  dated  April 20,
2005. We agree with the statements concerning our Firm in such Form 8-K.


Very truly yours,


PricewaterhouseCoopers LLP