Ophthalmic lens having an aspheric surface

Details Ophthalmic lens having an aspheric surface Ophthalmic lens having an aspheric surface

1979-10-22

1981-07-21

Clark, Conrad J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

350432, G02B 304, G02C 702

Patent

active

042794803

ABSTRACT:
An ophthalmic lens is described having a front face which is a surface of revolution and is located entirely in front of the transverse plane tangential to its center. The curve representing the half-meridian of this front face corresponds to the following general formula:

REFERENCES:
patent: 2482698 (1949-09-01), Tillyer
patent: 3778133 (1973-12-01), Tatian
patent: 3797922 (1974-03-01), Plummer
patent: 4181409 (1980-01-01), Whitney et al.

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