Synthetic polymer for endocapsular lens replacement

Details Synthetic polymer for endocapsular lens replacement Synthetic polymer for endocapsular lens replacement

1989-09-01

1990-04-24

Rosenbaum, C. Fred

Surgery

Miscellaneous

Methods

623 6, A61B 1900

Patent

active

049191519

ABSTRACT:
A synthetic polymer (24) is provided for endocapsular lens (18) replacement in an eye (10). The polymer, whch is injected into the lens capsule (16) after removal of the lens, comprises an oxygen-stabilized photosensitive prepolymer. An example of such a prepolymer comprises polyether with urethane linkages with one or both ends capped with a functional group containing at least one double bond, such as an acrylate, a methacrylate, or a styrene.
The polymerization reaction is initiated with a photoinitiator such as dimethoxyphenylacetophenone and is quenched in the presence of oxygen. Contrary to the prior art polymers, the time of curing is on the order of only a minute or so. The viscosity and thickness of the polymer formed may be tailored to achieve a desired index of refraction of between about 1.3 and 1.6.

REFERENCES:
patent: 4191176 (1980-03-01), Spina et al.
patent: 4327450 (1982-05-01), Girard
patent: 4543398 (1985-09-01), Bany et al.
patent: 4638040 (1987-01-01), Hammar
patent: 4673539 (1987-06-01), Hammer et al.

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