Contact lenses
First Claim
1. A contact lens comprising:
- a molded lens body comprising a hydrogel interpenetrating polymer network composition comprisinga first hydrophilic polymer component formed from a polymerization of one or more monomers and a crosslinker that crosslinks said one or more monomers, and said polymerization taking place in the presence of a pre-formed second hydrophilic polymer component; and
said pre-formed second hydrophilic polymer component interpenetrating the first hydrophilic polymer component, the second polymer component being water soluble,the molded lens body having an increased water retention relative to an identical lens body without the second polymer component, wherein said second hydrophilic polymer component is present in an amount of from 5% to 10% based on the weight of said hydrogel composition.
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Accused Products
Abstract
An interpenetrating polymer network (IPN) composition and a process for the manufacture of hydrogel contact lens using the invention material. The polymeric materials are formed by polymerization of: (1) an unsaturated alkyl(meth)acrylate or its derivatives such as 2-hydroxyethyl methacrylate as the principle monomer; (2) optionally vinyl containing comonomer(s) to enhance the resulting hydrogel water absorbing capability; (3) polymerizable multi-functional crosslinking agent(s); (4) an irradiation initiator and/or thermal initiator; (5) optionally other additives to impart the resulting hydrogel specific properties such as ultra-violet blocking ability and handling colors; in the presence of a soluble, hydrophilic IPN agent such as polyvinylpyrrolidone (PVP) or poly-2-ethyl-2-oxazoline (PEOX) with a specific molecular weight range. The novel hydrophilic hydrogel material in the present invention can be used to produce a spherical contact lens, a toric contact lens, a multifocal contact lens, a toric-multifocal contact lens, and other medical devices. The inventive hydrogel material shows a low degree of surface friction, a low dehydration rate, and a high degree of biodeposit resistance.
118 Citations
57 Claims
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1. A contact lens comprising:
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a molded lens body comprising a hydrogel interpenetrating polymer network composition comprising a first hydrophilic polymer component formed from a polymerization of one or more monomers and a crosslinker that crosslinks said one or more monomers, and said polymerization taking place in the presence of a pre-formed second hydrophilic polymer component; and said pre-formed second hydrophilic polymer component interpenetrating the first hydrophilic polymer component, the second polymer component being water soluble, the molded lens body having an increased water retention relative to an identical lens body without the second polymer component, wherein said second hydrophilic polymer component is present in an amount of from 5% to 10% based on the weight of said hydrogel composition. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 53)
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- 24. A molded contact lens comprising a polymerized reaction product of at least one polymerizable monomer and a crosslinker, wherein said polymerized reaction product is formed in the presence of a polyvinylpyrrolidone having a weight average molecular weight of at least 10,000, the polyvinylpyrrolidone being present in the composition in an amount from approximately 1% to 14%.
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37. A contact lens comprising:
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a molded lens body comprising a hydrogel interpenetrating polymer network composition comprising a first polymer component formed from a polymerization of one or more monomers and a crosslinker that crosslinks said one or more monomers, and said polymerization taking place in the presence of a second hydrophilic polymer component; and said second hydrophilic polymer component interpenetrating the first polymer component, the second hydrophilic polymer component being selected from the group consisting of polyvinylpyrrolidone, poly-2-ethyl-2-oxazoline, poly(4- vinylpyridine N-oxide) and combinations thereof, wherein approximately 1 wt % to 14 wt % of the second hydrophilic polymer component is present. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48)
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49. A hydrogel contact lens comprising:
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a molded lens body comprising a hydrogel interpenetrating polymer network composition comprising; (i) a first polymer component formed from a polymerization of one or more monomers and a crosslinker that crosslinks said one or more monomers, and said polymerization taking place in the presence of a polyvinylpyrrolidone; and (ii) said polyvinylpyrrolidone interpenetrating the first polymer component, wherein approximately 1 wt % to 14 wt % of the polyvinylpyrrolidone component is present. - View Dependent Claims (50, 51, 52)
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54. A contact lens, comprising:
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a molded lens body obtained from a contact lens mold assembly including a female lens mold and a male lens mold, the molded lens body comprising a polymerized reaction product of at least one polymerizable monomer and a crosslinker, and taking place in the presence of a preformed polyvinylpyrrolidone polymer having a weight average molecular weight of at least 10,000; and wherein the polyvinylpyrrolidone polymer is present in the composition in an amount from approximately 1 wt % to 14 wt %.
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55. A contact lens, comprising:
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a molded lens body obtained from a contact lens mold assembly including a female lens mold and a male lens mold, the molded lens body comprising a polymerized reaction product of at least one polymerizable monomer and a crosslinker, wherein said reaction product is formed in the presence of a preformed polyvinylpyrrolidone polymer having a weight average molecular weight of at least 10,000; and wherein the polyvinylpyrrolidone polymer is present in the composition in an amount from approximately 1 wt % to 14 wt %.
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56. A contact lens, comprising:
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a molded lens body obtained from a contact lens mold assembly including a female lens mold and a male lens mold, the molded lens body comprising a polymerized reaction product of at least one polymerizable monomer and a crosslinker and taking place in the presence of a preformed polyvinylpyrrolidone polymer, wherein said polyvinylpyrrolidone polymer interpenetrates said polymerized reaction product and said preformed polyvinylpyrrolidone polymer having a weight average molecular weight of at least 10,000; and wherein the polyvinylpyrrolidone polymer is present in the composition in an amount from approximately 1 wt % to 14 wt %.
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Specification