Apparatus for performing ophthalmological surgery

Details Apparatus for performing ophthalmological surgery Apparatus for performing ophthalmological surgery

1989-03-23

1994-05-17

Shay, David

Surgery

Instruments

Light application

606 17, 2191216, A61N 506

Patent

active

053123204

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 precharacterized distribution of flux density across the cross-section of laser-beam projection, in the context of beam size, at cornea incidence, to match the area to be ablated, and the duration of exposure determines the extent of curvature change. Illustrative techniques and situations are disclosed, for myopia correction, for hyperopia correction, and for astigmatism correction.

REFERENCES:
"Carbon Dioxide Laser Beam Control for Corneal Surgery", Keates et al.; Ophthalmic Surg.; vol. 12, No. 2; Feb. 1981, pp. 117-122.
"In vivo Experiments with the Excimer Laser--Technical Parameters and Healing Processes", by Seiler et al.; Ophthalmologica, vol. 192, 1986, pp. 65-70.

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