Progressive power lens and mold for producing same

Details Progressive power lens and mold for producing same Progressive power lens and mold for producing same

1995-08-21

1998-12-01

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

425808, G02C 706, B29D 1100

Patent

active

058446575

ABSTRACT:
A progressive power lens has an effective surface including a progressive surface which progressively varies the power, and a peripheral rim surface portion which surrounds the progressive surface yet does not function as an effective surface. The rim surface is curved. The invention is also directed to a mold to produce a progressive power lens. The mold includes a portion which forms progressive surface which progressively varies the power of the lens and a curved rim surface forming portion which forms a rim surface of the lens which does not function as a progressive surface.

REFERENCES:
patent: 4118853 (1978-10-01), Mignen
patent: 4950057 (1990-08-01), Shirayanagi
patent: 5096626 (1992-03-01), Takamizawa et al.
patent: 5235359 (1993-08-01), Chauveau et al.

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