Extended wear ophthalmic lens

US8415404B2 · 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 Jorg 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: Jun 4, 2010
• Grant date: Apr 9, 2013
• Expiry date: Aug 7, 2030

Classification

• Technology area (CPC C): Chemistry; Metallurgy
• CPC primary: C08L75/04
• WIPO field: Macromolecular chemistry, polymers
• WIPO sector: Chemistry

Abstract

An ophthalmic lens suited for extended-wear periods of at least one day on the eye without a clinically significant amount of corneal swelling and without substantial wearer discomfort. In one embodiment, an ophthalmic lens is a copolymerization product of at least one oxyperm, at least one ionoperm, and a crosslinker. In one embodiment, a lens has a tensile modulus of less than about 3.0 MPa, yet in another embodiment, the tensile modulus is between about 0.5 to about 1.5 MPa.