Surgery – Instruments – Light application
Patent
1995-04-03
1996-08-27
Shay, David M.
Surgery
Instruments
Light application
606 5, 606 12, 606 12, 606 13, H61N 506
Patent
active
055495990
ABSTRACT:
An apparatus for laser surgery on a cornea for correcting the refractive error of a patient's eye by removing away a part of the cornea by a laser beam. The apparatus has a first set device for setting the removing area in removal of stroma of the cornea, a second set device for setting the shape of the postoperation cornea, a device for restricting laser irradiation to the removing area determined by the second set device, a device for detecting whether removal of the epithelium from the cornea is accomplished, a device for changing a mode to remove away the epithelium to a mode to remove the stroma of the cornea based on detected results by the detecting device, and a control device for determining the area to be removed away on the epithelium based on the removing area set by the first set device in a mode for removing the epithelium of the cornea and driving the beam restricting device, and then for controlling the beam restricting device based on the set data by the second set device in a mode for removing the stroma of the cornea, thereby to remove away the stroma from the cornea in a desired shape.
REFERENCES:
patent: 4669466 (1987-06-01), L'Esperance
patent: 4913142 (1990-04-01), Kittrell et al.
patent: 4988348 (1991-01-01), Bille
Nidek Co. Ltd.
Shay David M.
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