Method and apparatus for ophthalmological surgery

Details Method and apparatus for ophthalmological surgery Method and apparatus for ophthalmological surgery

A - Human Necessities

61

F

327/1.2

A61F 9/00 (2006.01) A61F 9/01 (2006.01) A61B 17/30 (2006.01) A61B 18/20 (2006.01) A61F 9/008 (2006.01)

Patent

CA 1278046

METHOD AND APPARATUS FOR OPHTHALMOLOGICAL SURGERY ABSTRACT OF THE DISCLOSURE 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.

518916

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