Method for making UV-absorbing ophthalmic lenses
First Claim
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1. A method for producing UV-absorbing contact lenses, comprising the steps of:
- obtaining an ophthalmic lens;
dipping the ophthalmic lens in a coating solution, which comprises a first organic solvent and a UV-absorbing polymer dissolved in the first organic solvent, 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 50% by mole of carboxyl-containing monomeric units, wherein the UV-absorbing polymer is obtained by reacting a UV-absorbing compound with a precursor polymer having at least 50% by mole of carboxyl-containing monomeric units in a coupling reaction, wherein the UV-absorbing compound is represented by formula I, II, III, or IV
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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.
562 Citations
20 Claims
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1. A method for producing UV-absorbing contact lenses, comprising the steps of:
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obtaining an ophthalmic lens; dipping the ophthalmic lens in a coating solution, which comprises a first organic solvent and a UV-absorbing polymer dissolved in the first organic solvent, 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 50% by mole of carboxyl-containing monomeric units, wherein the UV-absorbing polymer is obtained by reacting a UV-absorbing compound with a precursor polymer having at least 50% by mole of carboxyl-containing monomeric units in a coupling reaction, wherein the UV-absorbing compound is represented by formula I, II, III, or IV - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for producing UV-absorbing contact lenses, comprising the steps of:
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obtaining an ophthalmic lens; dipping the ophthalmic lens in a coating solution, which comprises a first organic solvent and a UV-absorbing polymer dissolved in the first organic solvent, 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 50% by mole of carboxyl-containing monomeric units, wherein the first organic solvent is present in an amount of at least 60% by weight in the coating solution; rinsing the ophthalmic lens having the UV-absorbing coating thereon with a mixture of water and at most 50% by weight of a second organic solvent; and 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. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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Specification