Method of minimizing the maximum thickness of a unifocal ophthal

Details Method of minimizing the maximum thickness of a unifocal ophthal Method of minimizing the maximum thickness of a unifocal ophthal

1989-04-25

1991-07-23

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350413, 351159, G02C 702

Patent

active

050338390

ABSTRACT:
A unifocal ophthalmic lens has part-spherical concave and convex surfaces. Its refractive index varies radially from its optical axis to its periphery. The variation of the refractive index is governed by a law such that the absolute value of the optical power of the lens is significantly greater than its geometrical power when the optical power is computed using the refractive index of the lens on its optical axis.

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

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