Intraocular lens with fracture resistant haptics

Details Intraocular lens with fracture resistant haptics Intraocular lens with fracture resistant haptics

1996-02-26

1997-10-07

Jones, Mary Beth

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

Eye prosthesis

Intraocular lens

264 17, A61F 216

Patent

active

056742843

ABSTRACT:
The polymethyl methacrylate (PMMA) or copolymer thereof used to produce one-piece intraocular lenses is modified by a compression molding process to produce a much tougher material with improved mechanical properties. The process takes material in rod form and compresses into lens blanks. The molded lens blanks receive little or no compression strain in the center 4 mm optic zone. The compression is limited to the periphery region outside the center 4 mm zone. The intraocular lens fabricated from the molded lens blank exhibits greatly increased haptic mechanical properties and resistance to breakage.

REFERENCES:
patent: 4687485 (1987-08-01), Lim et al.
patent: 4995879 (1991-02-01), Dougherty
patent: 5037435 (1991-08-01), Chang et al.
patent: 5169569 (1992-12-01), Ingram et al.
patent: 5182053 (1993-01-01), Creasman et al.
patent: 5322649 (1994-06-01), Rheinish et al.

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