Hydrogel contact lenses of high biocompatibility

US6733123B2 · kind B2 · utility

Assignee

• Wohlk Contact-Linsen GmbH · DE

Inventors

• Kurt Polzhofer · Schwentinental, DE
• Roland Fromme · Schwentinental, DE
• Lothar Haase · Westerburg, DE
• K Herter · Bordesholm, DE
• Birgit Kollosche · Kiel, DE

Key dates

• Filing date: Nov 9, 2001
• Grant date: May 11, 2004
• Expiry date: Dec 29, 2021

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08F220/387
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A hydrogel contact lens is described, the HEMA basic material of which is copolymerized with SPE and amino acids. The water retention capability and the refractive index of the resulting contact lens are similar to those of the natural cornea.