STERLING, Va., April 2007 — A new U.S. Food and Drug Administration approval means WaveLight's Allegretto Wave Eye-Q excimer laser system for wavefront-guided LASIK and other procedures now can be used to treat mixed astigmatism of up to 6.00 diopters.

A company statement says the FDA has granted four approvals in the past year, enabling an expanded range of vision correction treatments for the excimer laser, including up to -7.00 diopters of nearsightedness.