Ophthalmic lens

Details Ophthalmic lens Ophthalmic lens

1992-04-21

1994-01-11

Sugarman, Scott J.

Optics: eye examining, vision testing and correcting

Spectacles and eyeglasses

Ophthalmic lenses or blanks

351160H, 359628, G02C 704

Patent

active

052785920

ABSTRACT:
An ophthalmic lens has front and rear optical surfaces, a central optical axis substantially perpendicular to the lens and comprises a plurality of concentric, contiguous circular refractive bands provided on at least one of the front and rear optical surfaces. The bands have a continuous cross-section in the shape of a segment of an ellipse having a given major axis length and eccentricity. The bands are of a given optical power to focus light on the focal plane. The major or the minor axis of each ellipse segment intersects the central optical axis and the focal plane. The bands are continuous at their boundaries between neighboring ones of the bands. The entire optical surface of the lens may be used with minimal distortion caused by the intersections of the continuous bands.

REFERENCES:
patent: 4898461 (1990-02-01), Portney
patent: 5106180 (1992-04-01), Marie et al.

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