Progressively varying focal power opthalmic lens

Details Progressively varying focal power opthalmic lens Progressively varying focal power opthalmic lens

1980-04-04

1981-12-29

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 706

Patent

active

043079458

ABSTRACT:
A progressively variable focal power ophthalmic lens. The lens has a unique geometry which allows the correction of distortion of horizontal and vertical lines to be retained below detectable levels in the temporal peripheral zone of the lens after the lens is rotated to accommodate the left or right eye. In addition, the geometry further allows the minimization of the astigmatic aberration in the area of the peripheral zone adjacent to the distance portion and the elimination of the astigmatic aberration in the lower part of the temporal peripheral zone.

REFERENCES:
patent: 3687528 (1972-08-01), Maitenaz
patent: 3711191 (1973-01-01), Tagnon
patent: 3785724 (1974-01-01), Cretin-Maitenaz
patent: 3910691 (1975-10-01), Maitenaz
patent: 4055379 (1977-10-01), Winthrop
patent: 4056311 (1977-11-01), Winthrop
patent: 4062629 (1977-12-01), Winthrop
patent: 4240719 (1980-12-01), Guilino et al.
patent: 4253747 (1981-03-01), Maitenaz

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