Apparatus for performing ophthalmic laser surgery

Details Apparatus for performing ophthalmic laser surgery Apparatus for performing ophthalmic laser surgery

1986-07-31

1988-03-08

Cohen, Lee S.

Surgery

Truss

Pad

128395, 350 62, 350 65, 350315, 219121LG, 219121LP, 219121LQ, A61N 506

Patent

active

047293721

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.

REFERENCES:
"Excimer Laser Surgery of the Cornea", by Trokel et al., Am. J. Opthal, 93: 710-715, 1983.

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