Contact lens bifocal with switch

Details Contact lens bifocal with switch Contact lens bifocal with switch

1991-02-22

1992-04-28

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

359 43, 359 44, 359558, G02C 704, G02F 113, G02B 2742

Patent

active

051081695

ABSTRACT:
A bifocal contact lens which contains two optical powers and a structure which serves as a switch to determine which power is operative as the wearer looks alternatively at objects located at various distances. The lens switch is designed so as to be triggered by the upper lid as it covers and uncovers various portions of the contact lens when the lens wearer is looking alternatively at objects located at various distances.

REFERENCES:
patent: 3794414 (1974-02-01), Wesley
patent: 3962505 (1976-06-01), Avery

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