Method of laser-sculpture of the optically used portion of the c

Details Method of laser-sculpture of the optically used portion of the c Method of laser-sculpture of the optically used portion of the c

1987-06-08

1988-09-27

Kamm, William E.

Surgery

Truss

Pad

128395, A61F 900

Patent

active

047734140

ABSTRACT:
The invention contemplates removal of epithelium-layer material from the anterior surface of the cornea, as a step preparatory to laser surgery, wherein controlled ultraviolet irradiation of the cornea is operative to surgically ablate corneal tissue within an epithelium-free area which is in the optically used central region of the cornea; the control is such (1) as first to effect essentially uniform-depth removal of Bowman's membrane to the extent of exposing only stroma tissue within said central region, and then (2) to so selectively distribute the ultraviolet radiation to then-exposed stroma tissue as to effect in stroma tissue a predetermined sculpted corrective-curvature change in the optically used region. Other important pre-surgury and post-surgery procedural steps are disclosed, for greater assurance of a predictable curvature change through the sculpting laser surgery.

REFERENCES:
patent: 4665913 (1987-05-01), L'Esperance
patent: 4732148 (1988-03-01), L'Esperance

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