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US 5,260,001 AGranted
Spincasting process for producing a series of contact lenses having desired shapes
AssigneeBausch & Lomb Incorporated
InventorsMahendra P. Nandu, Rajan S. Bawa
Life of this patent
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Abstract
An improved process for spincasting contact lenses with differently shaped concave lens surfaces from the same mold design comprises providing molds with uniformly shaped concave surfaces, and spincasting in the molds a series of polymerizable mixtures. Contact lenses with differently shaped concave lens surfaces are obtained by varying the ratio of the monomers and an organic diluent in the polymerizable mixtures.
Claims14
In a spincasting process for producing a series of contact lenses including contact lenses with differently shaped concave lens surfaces, the improvement comprising:
- providing molds with uniformly shaped concave surfaces and spincasting in said molds a series of polymerizable mixtures,
- wherein the contact lenses with differently shaped concave lens surfaces are obtained by varying a ratio of monomers and an organic diluent in the series of polymerizable mixtures.
Dependencies are inferred from the claim text.