Progressive lens for specialty and occupational use

Details Progressive lens for specialty and occupational use Progressive lens for specialty and occupational use

1993-01-12

1994-07-05

Bertsch, Richard A.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 706

Patent

active

053271815

ABSTRACT:
A progressive addition lens constructed on the bipolar principle in accordance with a power law having a steeper slope or gradient in the regions adjacent to the poles than in the middle region thereof between the poles.

REFERENCES:
patent: 4514061 (1985-04-01), Winthrop
patent: 4854689 (1989-08-01), Dufour et al.
patent: 4861153 (1989-08-01), Winthrop
patent: 5048945 (1991-09-01), Ueno et al.
patent: 5123725 (1992-06-01), Winthrop
patent: 5210553 (1993-05-01), Barth et al.

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