Lens system for variable refraction

Details Lens system for variable refraction Lens system for variable refraction

1981-10-15

1984-10-16

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350419, 351 41, 351161, G02B 106, G02B 312, G02C 704, G02C 706

Patent

active

044771584

ABSTRACT:
A lens system for variable refraction comprising a solid housing having a single internal chamber completely filled with a plurality of imiscible liquids of preselected densities and refractive indices. The chamber is of a form such that the amount and distribution of each liquid in the optical portion of the system is altered when the system is tilted, producing a change in refractive power. The system may be incorporated into spectacle lenses or contact lenses to provide a continuous spectrum of refractive power, or into contact lenses to provide bifocal capability.

REFERENCES:
patent: 3598479 (1971-08-01), Wright et al.
patent: 4174156 (1979-11-01), Glorieux

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