Gradient index, null geometrical power unifocal ophthalmic lens

Details Gradient index, null geometrical power unifocal ophthalmic lens Gradient index, null geometrical power unifocal ophthalmic lens

1989-04-25

1991-07-23

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350413, G02C 702

Patent

active

050338382

ABSTRACT:
A unifocal ophthalmic lens has a part-spherical concave surface and a part-spherical convex surface. Its refractive index varies radially from its optical axis to its periphery. It has a null geometrical power so that its optical power is due only to the variation in its refractive index.

REFERENCES:
patent: 3816160 (1974-06-01), Moore
patent: 4561736 (1985-12-01), Furter

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