Multi focal intra-ocular lens

Details Multi focal intra-ocular lens Multi focal intra-ocular lens

1992-04-08

1993-03-09

Frinks, Ronald

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

Eye prosthesis

Intraocular lens

351161, 351168, A61F 216

Patent

active

051923173

ABSTRACT:
The invention comprises an IOL with at least a center zone and two concentrically located ring zones arranged thereabout, the center zone having a distance power correction. The first concentric ring zone has a near power correction and the second concentric zone a distance power correction. In one embodiment the lens body is provided with haptics which act to center the lens body when it is surgically implanted within the posterior lens capsule.
In other embodiments, the lens diameter is increased to mate with the internal dimensions of the posterior lens capsule or is provided with an encircling haptic which bears against the posterior lens capsule.

REFERENCES:
patent: 4556998 (1985-12-01), Siepser
patent: 4573998 (1986-03-01), Mazzocco
patent: 4636211 (1987-01-01), Nielsen et al.
patent: 4637697 (1987-01-01), Freeman
patent: 4752123 (1988-06-01), Blaker
patent: 4781717 (1988-11-01), Grendahl
patent: 4804361 (1989-02-01), Anis
patent: 4813955 (1989-03-01), Achatz et al.
patent: 4890913 (1990-02-01), De Carle
patent: 4898461 (1990-02-01), Portney
patent: 5089024 (1992-02-01), Christie et al.
New Concepts in Circular Posterior Chamber Lenses, Ocular Surgery News, Oct. 1, 1987, Aziz Y. Anis, MD, pp. 16-18.

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