Prosthesis (i.e. – artificial body members) – parts thereof – or ai – Eye prosthesis – Intraocular lens
Patent
1988-05-17
1990-06-12
Frinks, Ronald L.
Prosthesis (i.e., artificial body members), parts thereof, or ai
Eye prosthesis
Intraocular lens
623 5, 351160R, 351176, A61F 216, A61F 214, G02C 702, G02C 704
Patent
active
049329707
ABSTRACT:
An ophthalmic lens having a size, shape, and composition adapted to be supported by the human eye in the optical path of the eye as an intraocular, contact, or corneal implant lens, includes a biocompatible lens body having a size and shape adapted to be supported by a human eye in the optical path of the eye. An optical portion of the lens body has anterior and posterior surfaces and a grooved portion defining a modified Fresnel or echelon lens pattern in at least one of the anterior and posterior surfaces. The modified echelon lens pattern includes annular zones that are configured so that at least some of the annular zones exhibit optical characteristics that vary circumferentially in order to at least partially correct for astigmatism.
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Allergan Inc.
Frinks Ronald L.
Hanson Loyal M.
Peterson Gordon L.
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