Alcon, Inc.

Matthew McCollum

Yongxing Qiu

John Dallas Pruitt

Newton T Samuel

Chung-Yuan Chiang

Kelly Kayi Tallau

Kasey Jon Minick

Richard Govan

The invention is generally related to a method for producing, in a consistent manner, contact lenses each having an intact durable coating thereon, wherein the coating is a hydrogel coating formed by covalently attached a hydrophilic polymeric material having azetidinium groups onto a base coating of a polyanionic polymer on a contact lens at a relatively low temperature (e.g., from about 40&#xb0; C. to about 60&#xb0; C.). The coating temperature for forming a durable hydrogel coating on top of the base coating of a contact lens can be significantly lowered by raising, in situ, the pH (to about 9.5 or higher) of a reactive coating solution which contains the hydrophilic polymeric material having azetidinium groups.

Method for producing coated contact lenses

The invention is related to a process for producing contact lenses that not only comprise a water gradient structural configurations, but also have a minimized uptakes of polyquaternium-1 and a long-lasting surface hydrophilicity and wettability even after being undergone a simulated 30-days lens care regime.

Method for producing MPS-compatible water gradient contact lenses

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Alpharetta, GA, United States of America

Matthew McCollum