Hydrogel-forming polymers used in intraocular lenses

Details Hydrogel-forming polymers used in intraocular lenses Hydrogel-forming polymers used in intraocular lenses

1988-09-15

1992-08-04

Nutter, Nathan M.

Synthetic resins or natural rubbers -- part of the class 520 ser

Synthetic resins

Processes of preparing a desired or intentional composition...

523108, 525 542, 525 5421, 525 5422, 525 5423, 525 543, 525 5431, 525 5432, 5262382, 52623821, 52623822, 52623823, 351160H, C08L 8900, C08G 6348, G02C 704

Patent

active

051359650

ABSTRACT:
Hydrogel-forming polymers for contact lenses and intraocular lenses having increased toughness despite high equilibrium water content comprise a hydrophilic monomer (e.g. an N-vinyl lactam) and a polyunsaturated polymeric cross-linking agent. UV-absorbers are also disclosed which are bound in the polymer structure so as to be inextractable, some undergoing photo-Fries re-arrangement on exposure to UV-radiation so as to become UV-absorbers in the re-arranged form.

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patent: 4504641 (1985-03-01), Nochumson
patent: 4511646 (1985-04-01), Fohrenkamm et al.
patent: 4620954 (1986-11-01), Singer et al.

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