Extended wear ophthalmic lens

US8568626B2 · kind B2 · utility

Assignee

• CIBA Vision Corporation · US

Inventors

• Paul Clement Nicolson · Dunwoody, US
• Richard Carlton Baron · Alpharetta, US
• Peter Chabrecek · Clayton, AU
• John Court · Sydney, AU
• Angelika Domschke · Duluth, US
• Hans Jorge Griesser · Cockatoo, AU
• Arthur Ho · Sydney, AU
• Jens Hopken · Lörrach, DE
• Bronwyn Glenice Laycock · Melbourne, AU
• Qin Liu · Corvallis, US
• Dieter Lohmann · Münchenstein, CH
• Gordon Francis Meijs · Melbourne, AU
• Eric Papaspiliotopoulos · Sydney, AU
• Judy Smith Riffle · Blacksburg, US
• Klaus Schindhelm · Hornsby, AU
• Deborah Sweeney · Chatswood, AU
• Wilson Leonard Terry, Jr. · Gainesville, US
• Jurgen Vogt · Fribourg, CH
• Lynn Cook Winterton · Roswell, US

Key dates

• Filing date: Oct 16, 2008
• Grant date: Oct 29, 2013
• Expiry date: Oct 16, 2028

Classification

• Technology area (CPC Y): Emerging Cross-Sectional Technologies
• CPC primary: Y10S525/937
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

A method for making a silicone hydrogel contact lens is provided. In one embodiment, a prepolymer mixture is polymerized in a lens mold in an atmosphere having less than about 10000 ppm oxygen to form a silicone hydrogel contact lens suitable for extended wear as characterized by producing less than 10% corneal swelling after a period of continuous wear of 7 days including normal sleep periods. In one embodiment, the prepolymer mixture comprises at least one oxyperm material containing hydrophilic groups, wherein the at least one oxyperm material is a siloxane-containing macromer or monomer, at least one ionoperm material, and a cross-linking agent. In certain embodiments, the polymerization of the prepolymer mixture may be carried out in an atmosphere having less than about 1000 ppm oxygen.