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US 2013/0095235 A1Published application
Method for making uv-absorbing ophthalmic lenses
AssigneeNovartis AG
InventorsHarald Bothe, Yongxing Qiu, Peter Hagmann
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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 and UV-absorbing monomeric units to form a UV-absorbing coating on the contact lens.
Claims16
A method for producing UV-absorbing contact lenses, comprising the steps of:
- obtaining an ophthalmic lens;
- dipping the ophthalmic lens in a coating solution comprising a first organic solvent and a UV-absorbing polymer for a period of time sufficient to form a UV-absorbing coating on the ophthalmic lens, wherein the UV-absorbing polymer comprises UV-absorbing monomeric units and at least about 50% by mole of carboxyl-containing monomeric units;
- and
- optionally covalently attaching a hydrophilic polymer or polymeric material having reactive functional groups onto the UV-absorbing coating to form a hydrogel coating, wherein the hydrogel coating is covalently attached onto the UV-absorbing coating through linkages each formed between one carboxylic group of the UV-absorbing coating and one reactive functional group of the hydrophilic polymer or polymeric material.
1 more element
Dependencies are inferred from the claim text.