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US 8,784,867 B2Granted
Contact lenses containing carotenoid and method for making same
AssigneeNovartis AG
InventorsNewton T. Samuel, Nirupama Kenkare, Peter D. Lackey, Jessie Chen
Life of this patent
Estimating the term…
Abstract
The instant invention pertains to a method for producing contact lenses with improved oxidative stability of Carotenoids in the contact lens. The method of the invention involves adding a vitamin E material into a contact lens in an amount sufficient to reduce oxidative degradation of Carotenoids in the lens by at least about 30% in comparison with an identical contact lens without the vitamin E material.
Claims14
A method for preparing a contact lens, comprising the steps of:
- (a) obtaining a contact lens,
- (b) immersing the contact lens in a solution containing a carotenoid and a vitamin E material;
- for a period of time sufficient to load a desired amount of a carotenoid and a vitamin E material;
- and
- (c) autoclaving the contact lens of step (b) to sterilize the contact lens, wherein the contact lens has a lower oxidative degradation of carotenoids during lens autoclave and/or lens storage by at least about 30% in comparison to an identical contact lens without the vitamin E material.
2 more elements
A contact lens, comprising:
- a formed water swellable, polymeric lens body;
- a carotenoids and a vitamin E material, wherein the vitamin E material is present in an amount sufficient to reduce oxidative degradation of the carotenoids during lens autoclave and/or lens storage by at least about 30% in comparison to an identical contact lens without the vitamin E material.
Dependencies are inferred from the claim text.