Diffractive/refractive lens implant

Details Diffractive/refractive lens implant Diffractive/refractive lens implant

1990-03-22

1992-02-18

Frinks, Ronald

Prosthesis (i.e., artificial body members), parts thereof, or ai

Eye prosthesis

Intraocular lens

A61F 216

Patent

active

050890239

ABSTRACT:
In an intraocular optical implant including a refractive/diffractive lens having an anterior surface and a posterior surface and a generally anterior-posterior optical axis, at least one of the surfaces has a diffractive lens profile covering about half the effective lens area of the lens. Preferably the diffractive lens profile occupies a sectoral portion of the effective lens area, as for example a semicircular sectoral portion, or a plurality of sectoral portions the sum of whose subtended angles is about 180.degree., as for example two sectoral portions each of whose subtended angles is about 90.degree..

REFERENCES:
patent: 4813955 (1989-03-01), Achatz et al.
patent: 4881805 (1989-11-01), Cohen
patent: 4923296 (1990-05-01), Erickson

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