Spectacle lens

Details Spectacle lens Spectacle lens

1993-03-25

1995-08-22

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 706

Patent

active

054445035

ABSTRACT:
The invention is directed to a spectacle lens having a multifocal surface and a prescription surface. The prescription surface is a general aspheric surface without point and axis symmetry. Of the individual use conditions, at least the dioptric power is considered within an area when determining the geometry of the prescription surface. The prescription surface is provided exclusively for generating the dioptric power in the reference points and additionally for eliminating the increase of imaging errors.

REFERENCES:
patent: 3722986 (1973-03-01), Tagnon
patent: 3910691 (1975-10-01), Maitenaz
patent: 3950082 (1976-04-01), Volk
patent: 4606622 (1986-08-01), Fueter et al.
patent: 5083859 (1992-01-01), Jalie
patent: 5137343 (1992-08-01), Kelch et al.
"Neue progressive Flachen" by G. Guilino et al, DOZ, No. 11, Nov. 20, 1980, pp. 20 to 23.

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