Process of manufacturing contact lenses with measured exposure to oxygen

US6610220B1 · kind B1 · utility

Assignee

• Johnson & Johnson Vision Care, Inc. · US

Inventors

• Jeffrey D. Caltrider · Jacksonville Beach, US
• Joseph W. Ricard · Jacksonville, US
• Terry L. Spaulding · Jacksonville, US
• Jeffrey Steven · Jacksonville, US
• Olin W. Calvin · Jacksonville, US
• John B. Enns · Jacksonville, US
• Ture Kindt-Larsen · Vejle, DK

Key dates

• Filing date: May 12, 2000
• Grant date: Aug 26, 2003
• Expiry date: May 12, 2020

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B29L2031/757
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

This invention provides a method of manufacturing a contact lens comprising the step of: dosing a contact lens mold comprising optical mold surfaces with an oxygen-sensitive reaction mixture, wherein said optical surfaces of said contact lens mold have between from 0.13×10−9 to 2.6×10−9 moles/cm2 O2 available to interfere with the reaction of said reaction mixture. This invention further provides a method of manufacturing a contact lens comprising the steps of: dosing a contact lens mold comprising optical mold surfaces with a reaction mixture, and sealing said reaction mixture and said optical mold surfaces away from a gaseous environment, wherein said optical surfaces of said contact lens mold were exposed to said gaseous environment comprising greater than 0.5 percent oxygen just prior to said sealing step.