Astigmatic laser ablation of surfaces
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United States of America Patent
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Oct 24, 1995
Grant Date -
N/A
app pub date -
Jun 4, 1993
filing date -
Jun 4, 1993
priority date (Note) -
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Abstract
Laser surface ablation methods and apparatus are disclosed reprofiling surfaces astigmatically. An optical system includes cylindrically-powered elements to form an elliptical laser irradiation pattern on a target surface. By successively altering the area of the elliptical irradiation, an astigmatic, bi-powered ablation profile is achieved. Preferably, the invention is used with an excimer laser for excimer laser keratoplasty, keratomileusis or other ablative eye surgeries.
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