Progressive multifocal lens and spectacles using same

Details Progressive multifocal lens and spectacles using same Progressive multifocal lens and spectacles using same

1986-06-30

1988-08-09

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351168, G02C 706

Patent

active

047624086

ABSTRACT:
Progressive multifocal ophthalmic lenses are provided having a far vision viewing zone, a near vision viewing zone and an intermediate vision viewing zone therebetween. A central basic curve extends essentially vertically through the far, intermediate and near vision viewing zones. The sizes of the zones and configuration of the zones are set by predetermined conditions and equations. The construction provides improved lenses for use especially where intermediate and near vision viewing is required.

REFERENCES:
patent: 4537479 (1985-08-01), Shinohara et al.

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