Optical lens for differential correction

Details Optical lens for differential correction Optical lens for differential correction

1977-10-31

1979-11-13

Corbin, John K.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350179, 350180, 351161, G02B 312, G02C 706

Patent

active

041741560

ABSTRACT:
An optical lens for differential correction comprising two transparent walls defining an enclosed space having therein a quantity of a transparent liquid with a predetermined optical index; the walls are so formed as to provide at the optical center a capillary space into which the liquid is aspirated when the lens is tilted at a predetermined angle for changing the power of the lens.

REFERENCES:
patent: 3598479 (1971-08-01), Wright
patent: 3614215 (1971-10-01), Macta

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