EXHIBIT 23.1

            CONSENT OF INDEPENDENT REGISTERED PUBLIC ACCOUNTING FIRM


We consent to the incorporation by reference in the Registration Statement on
Form S-8 (No. 333-130237) pertaining to the Cynosure 1992 Stock Option Plan,
Cynosure 2004 Stock Option Plan, and the Cynosure 2005 Stock Option Plan of our
report dated February 8, 2006, with respect to the consolidated financial
statements of Cynosure, Inc. included in the Annual Report (Form 10-K) for the
year ended December 31, 2005.

/s/ Ernst & Young LLP

Boston, Massachusetts
March 24, 2006