Bifocal contact lens of the bivisual type

Details Bifocal contact lens of the bivisual type Bifocal contact lens of the bivisual type

1983-12-09

1986-10-21

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

G02C 704, G02C 706

Patent

active

046182284

ABSTRACT:
A bifocal contact lens has two, differently-focusing lens parts with a transitional zone therebetween and an arrangement to orient the zone vertically in use. The focus of the lens part then closer to user's nose is preferably adapted for reading and the other for distance. Preferably, too, the transitional area runs across the optical and physical center of at least an optical portion of the lens.

REFERENCES:
Obrig, T. E., Modern Ophthalmic Lenses and Optical Glass, New York (1944), pp. 266-269.

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