Inventors:
Victor L. Copeland - Rancho Santa Fe CA
Steven G. Pratt - Rancho Santa Fe CA
International Classification:
G02C 702
Abstract:
A plano-aspheric spectacle lens that is particularly beneficial under night and low-light conditions and/or by those who have had refractive surgery. A first refractive surface of the lens, preferably the back or concave side, has an aspheric surface with a power of from about minus 0. 20 to minus 0. 37 diopters and a central, generally circular, spherical area having no power and a diameter of from about 1 to 5 mm. If any corrections are required for eye anomalies such as refractive error, astigmatism or the like, those corrections are applied to the lens surface opposite the plano-aspheric surface, preferably the back or concave surface.