Multifocal intraocular lens

Details Multifocal intraocular lens Multifocal intraocular lens

1987-09-10

1992-10-27

Frinks, Ronald

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

Eye prosthesis

Intraocular lens

351161, 351168, A61F 216

Patent

active

051585723

ABSTRACT:
Multifocal lenses are formed having a substantially circular central region having a first optical power, surrounded by a plurality of concentric ring regions which alternate between at least two optical powers, one of which may be the first optical power. Preferably, the central region is powered for near vision. For example, one embodiment of the invention is a bifocal lens having a central near-vision portion, a first concentric ring region powered for distance vision, and a second concentric ring region having the same power as the central region.

REFERENCES:
patent: 4170043 (1979-10-01), Knight et al.
patent: 4402579 (1983-09-01), Poler
patent: 4636211 (1987-01-01), Nielsen et al.
patent: 4704016 (1987-11-01), DeCarle
patent: 4813955 (1989-03-01), Achatz et al.

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