Exhibit 99.4

[LETTERHEAD OF CIBC WORLD MARKETS CORP.]

The Board of Directors

PhotoMedex, Inc.

147 Keystone Drive

Montgomeryville, Pennsylvania 18936

Members of the Board:

CIBC World Markets Corp. (“CIBC World Markets”) hereby consents to the inclusion of the opinion letter of CIBC World Markets to the Board of Directors of PhotoMedex, Inc. (“PhotoMedex”) as Annex C to, and reference thereto under the captions “Summary of the Joint Proxy Statement/Prospectus – Opinion of PhotoMedex’s Financial Advisor” and “The Merger – Opinion of PhotoMedex’s Financial Advisor – CIBC World Markets Corp.” in, the Joint Proxy Statement/Prospectus relating to the proposed merger transaction involving PhotoMedex and ProCyte Corporation, which Joint Proxy Statement/Prospectus forms a part of the Registration Statement on Form S-4 of PhotoMedex. In giving such consent, we do not admit that we come within the category of persons whose consent is required under, and we do not admit that we are “experts” for purposes of, the Securities Act of 1933, as amended, and the rules and regulations promulgated thereunder.

Very truly yours,

/s/ CIBC WORLD MARKETS CORP.

CIBC WORLD MARKETS CORP.

New York, New York

January 5, 2005