The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Oct. 27, 1992
Filed:
Dec. 07, 1989
Jiri Sulc, Prague, CS;
Zuzana Krcova, Prague, CS;
Ceskoslovenska akademie ved, Prague, CS;
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.