Method for cast moulding contact lenses with a rounded edge...

Details Method for cast moulding contact lenses with a rounded edge... Method for cast moulding contact lenses with a rounded edge...

2005-08-02

2005-08-02

Sugarman, Scott J. (Department: 2873)

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

C351S177000

Reexamination Certificate

active

06923538

ABSTRACT:
Methods for producing contact lenses include providing a back surface tool having a surface generally corresponding to a desired contact lens surface and a convex curve along an outer radius thereof, positioning the tool in a molding apparatus, introducing a moldable material into the molding apparatus to form a first mold section having a negative impression of the surface of the tool, assembling the first mold section with a second mold section to form a lens shaped cavity therebetween and forming a contact lens member in the lens shaped cavity of the assembled mold sections. Molds useful in producing contact lenses, tools useful in making mold sections for molding contact lenses and contact lenses having rounded edge surfaces are also provided.

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patent: 0 383 425 (1990-08-01), None
patent: WO 01/42001 (2001-06-01), None

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