Toric surfacecasting

Details Toric surfacecasting Toric surfacecasting

1996-10-08

1998-08-11

Font, Frank G.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351176, G02C 702, G02C 704

Patent

active

057934657

ABSTRACT:
An optical preform has a predetermined spherical curve on a concave surface of the optical preform, a predetermined spherical curve on a convex surface of the optical preform and a near add power. A thin resin is applied to the concave surface of the optical preform and molded to form a toric layer by a mold having a toric, convex mold surface. The resin layer is then cured and the mold removed to form a finished ophthalmic lens.

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