Hydrogel-forming polymers used in intraocular lenses
First Claim
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1. An intraocular lens made from a cross-linked hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent.
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Abstract
Hydrogel-forming polymers for contact lenses and intraocular lenses having increased toughness despite high equilibrium water content comprise a hydrophilic monomer (e.g. an N-vinyl lactam) and a polyunsaturated polymeric cross-linking agent. UV-absorbers are also disclosed which are bound in the polymer structure so as to be inextractable, some undergoing photo-Fries re-arrangement on exposure to UV-radiation so as to become UV-absorbers in the re-arranged form.
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Citations
9 Claims
- 1. An intraocular lens made from a cross-linked hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent.
- 3. A contact lens made from a cross-linked hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent.
- 5. An intraocular lens made of a UV-absorbing hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent, the polymer including units containing a UV-absorbing moiety which in the final polymer network is bound as part of the polymer structure.
- 7. A contact lens made of a UV-absorbing hydrogel-forming polymer comprising at least one hydrophillic monomer and at least one polyunsaturated polymeric cross-linking agent, the polymer including units containing a UV-absorbing moiety which in the final polymer network is bound as part of the polymer structure.
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