Lenses from polymeric derivatives of acrylic and methacrylic aci

Details Lenses from polymeric derivatives of acrylic and methacrylic aci Lenses from polymeric derivatives of acrylic and methacrylic aci

1989-12-07

1992-10-27

Sluby, P. C.

Stock material or miscellaneous articles

Composite

Of addition polymer from unsaturated monomers

428516, 351160H, 351160R, 427164, G02C 704, C08F 832, B32B 2730

Patent

active

051588323

ABSTRACT:
A lens made from a non-hydrophilic acrylate or methacrylate polymer or copolymer for application in an aqueous medium inside a human eye or on its surface, i.e., an intraocular or contact lens, is provided wherein the originally non-hydrophilic surface layer has been hydrophilized by a partial hydrolysis or sulfonation in such a way that a gradient of swelling results such that the swelling decreases from a maximum on the very surface to a minimum in the non-swelling core, which is unaffected by hydrophilization. Accordingly, light reflexes are eliminated or at least substantially reduced as well as the tendency of the surface to grow cells, the irritation of neighboring living tissues, and the formation of pressure necroses.

REFERENCES:
patent: 4128318 (1978-12-01), Sieglaff et al.
patent: 4632527 (1986-12-01), Masso et al.
patent: 4893918 (1990-01-01), Sulc et al.

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