Intraocular lens with multiple-fulcrum haptic

Details Intraocular lens with multiple-fulcrum haptic Intraocular lens with multiple-fulcrum haptic

1987-02-10

1989-09-05

Frinks, Ronald L.

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

Eye prosthesis

Intraocular lens

A61F 216

Patent

active

048634654

ABSTRACT:
An intraocular lens for implantation within an eye after cataract surgery. The intraocular lens has a haptic having an elongated gently curving seating portion having a free end and a weakened portion about which such seating portion pivots. The weakened portion is spaced from the fulcrum formed at the location at which the haptic is anchored to the lens body such that the free end of the seating portion moves toward the lens body in response to compression of the seating portion toward the lens body for facilitating seating thereof, while minimizing the risk of injury to the delicate membranes in the eye by outwardly extending distal portions of the haptics. The construction of the lens being such that except for the weakened portion of the haptic, the entire haptic, including the seating portion, would pivot about the point of connection of the haptic to the lens body with the result that the free end portion would move away from, or at least not toward, the lens body, in response to such compression of the seating portion.

REFERENCES:
patent: 4092743 (1978-06-01), Kelman
patent: 4244060 (1981-01-01), Hoffer
patent: 4249271 (1981-02-01), Poler
patent: 4402579 (1983-09-01), Poler
patent: 4403353 (1983-09-01), Tennant
patent: 4418431 (1983-12-01), Feaster
patent: 4624670 (1986-11-01), Bechert, II
patent: 4655775 (1987-04-01), Clasby, III
patent: 4676794 (1987-06-01), Kelman

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