Aspherical optical molds for continuous reshaping the cornea bas

Details Aspherical optical molds for continuous reshaping the cornea bas Aspherical optical molds for continuous reshaping the cornea bas

1995-03-10

1997-12-09

Buiz, Michael

Surgery

Instruments

Corneal cutter or guide for corneal cutter

623 5, 351161, A61F 900

Patent

active

056955090

ABSTRACT:
Continuous, aspheric optical molds for reshaping the surface of the cornea having an inner concave surface matched to the topography of the cornea. The curvatures of the molds are modified from a curve matched to a patient's corneal topography to include a flattened pressure zone applying relative pressure and thereby displacing underlying corneal tissue, a steepened relief zone raised away from the surface of the cornea to receive displaced corneal tissue, and a flattened anchor zone to control and direct movement of displaced corneal tissue into the relief zones.

REFERENCES:
patent: 3212097 (1965-10-01), Adler
patent: 4898461 (1990-02-01), Portney
patent: 4952045 (1990-08-01), Stoyan
patent: 5152786 (1992-10-01), Hanna
patent: 5191365 (1993-03-01), Stoyan
patent: 5196027 (1993-03-01), Thompson et al.
patent: 5318046 (1994-06-01), Rozakis
patent: 5349395 (1994-09-01), Stoyan
patent: 5404183 (1995-04-01), Seidner

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