Synthetic polymer for endocapsular lens replacement

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

A - Human Necessities

61

L

3/112, 167/328

A61L 27/00 (2006.01) A61F 2/16 (2006.01) A61F 9/00 (2006.01) A61L 27/14 (2006.01)

Patent

CA 1330951

SYNTHETIC POLYMER FOR ENDOCAPSULAR LENS REPLACEMENT ABSTRACT OF THE DISCLOSURE A synthetic polymer (24) is provided for endocapsular lens (18) replacement in an eye (10). The polymer, which 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 pho- toinitiator 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 re- fraction of between about 1.3. and 1.6.

570656

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