Method for performing ophthalmic laser surgery
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United States of America Patent
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Mar 22, 1988
Issued Date -
N/A
app pub date -
Jul 31, 1986
filing date -
Nov 17, 1983
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention contemplates controlled ablation of the cornea, using ultraviolet laser radiation, wherein irradiated flux density and exposure time are so controlled as to achieve desired depth of the ablation. Sculpturing action results from controlled change of projected laser-spot size, in the course of a given treatment, wherein, in one illustrative case, projected laser-spot size ranges from a maximum which covers the entire area to be treated, down to a predetermined minimum tolerable size, wherein cornea-curvature change is myopia-corrective. Further illustrative techniques and situations are also disclosed, for achievement of hyperopia correction, for astigmatism correction, and in connection with corneal-transplant operations.
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