Surgery – Instruments – Light application
Patent
1992-09-14
1994-11-15
Shay, David M.
Surgery
Instruments
Light application
606 10, 606 13, 61A 502, A61N 502
Patent
active
053643887
ABSTRACT:
An apparatus and method for delivering radiant energy beams onto an area of a cornea in a line focus to create a linear incisions. The radiant energy beams may be focused in a linear configuration onto the external surface of the cornea or onto intrastromal areas of the cornea of an eye to ablate the cornea in a radial slot, circumferential curved slot, or lenticular pattern, and thereby modify its curvature and refractive power. The apparatus includes an array of central reflectors and an assembly of peripheral reflectors. Each central reflector is associated with a respective peripheral reflector so that a beam reflected by the central reflector is intercepted by its associated peripheral reflector and is again reflected to precisely incise either external or internal areas of the cornea. Each peripheral reflector has a curved reflective surface to provide a line focus on the cornea, including both rectilinear and curvilinear line focus to create radial and circumferential curved incisions. In a modified embodiment, the assembly of peripheral reflectors and the array of central reflectors rotate to permit lathing of the cornea.
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