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Lasik Doctors


Trials Support Wavefront Lasik For Farsighted

Bausch & Lomb's Zyoptix hyperopia study indicates good results, Visx already approved.

Zyoptix wavefront analysis creates a unique "fingerprint" of the eye's optics that is converted into a map for Lasik.


HOUSTON -- May 31, 2006 -- Initial findings of a US Food and Drug Administration (FDA) clinical trial for approval of Bausch & Lomb's Zyoptix excimer laser indicate results with advanced wavefront-guided Lasik for farsighted vision better than conventional Lasik.

Wavefront-guided Lasik utilizes a detailed mapping system of the optics of each patient's eye to determine the best method of correction for myopia (nearsighted, shortsighted), hyperopia (farsighted, longsighted) vision, and astigmatism (irregular cornea).

The information released by Stephen Slade, MD of Houston, TX, describes the methods and results of a prospective, randomized, contralateral eye trial performed on 80 eyes of 40 patients. One eye received Lasik with wavefront-guided Zyoptix and the other conventional LASIK (Planoscan). Fully 90% of Zyoptix (vs. 67% Planoscan) eyes were within 0.50 diopter of the target and 95% vs. 78% were within 1.00 D. Slight undercorrection for Zyoptix vs. slight overcorrection for Planoscan was noted.

Higher order aberration, a measurement of imperfections of the optics of the eye, was significantly lower for Zyoptix eyes vs. Planoscan, according to Slade.

Zyoptix competitor for the farsighted Lasik laser market Visx received FDA approval for wavefront-guided hyperopia correction in December 2004.

Image courtesy Bausch & Lomb

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