Method for making improved UV-absorbing ophthalmic lenses

US10338408B2 · kind B2 · utility

Assignee

• Novartis AG · CH

Inventors

• Harald Bothe · Niedernhausen, DE
• Peter Hagmann · Erlenbach a.Main, DE

Key dates

• Filing date: Dec 16, 2013
• Grant date: Jul 2, 2019
• Expiry date: Dec 22, 2035

Classification

• Technology area (CPC G): Physics
• CPC primary: G02B1/043
• WIPO field: Other special machines
• WIPO sector: Mechanical engineering

Abstract

Described herein is a cost-effective and time-efficient method for making UV-absorbing contact lenses. In contrast to the conventional method for making UV-absorbing contact lenses which involves copolymerizing a lens forming composition including a UV-absorbing vinylic monomer, a method of the invention involves dipping a contact lens in a solution of UV-absorbing polymer comprising carboxyl-containing monomeric units, UV-absorbing monomeric units and covalently bound radical-initiating moieties to form a UV-absorbing coating on the contact lens.