Method for making contact lenses

US8440735B2 · kind B2 · utility

Assignee

• Novartis AG · CH

Inventors

• John Dallas Pruitt · Suwanee, US
• Lynn Cook Winterton · Roswell, US
• Bernhard Seiferling · Goldbach, DE
• Juergen Vogt · Eindhoven, NL
• Harald Bothe · Niedernhausen, DE

Key dates

• Filing date: Jul 13, 2010
• Grant date: May 14, 2013
• Expiry date: Feb 15, 2031

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29C33/60
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

The instant invention pertains to a method and a fluid composition for producing contact lenses with improved lens quality and with increased product yield. The method of the invention involves adding a phospholipid into a fluid composition including a lens-forming material in an amount sufficient to reduce an averaged mold separation force by at least about 40% in comparison with that without the phospholipids.