Patent ID: 9170432
Filing Date: 2015-10-27
Classification: B29D,G02C

Abstract:
1. A spectacle lens, comprising: a first surface having a first surface shape; and a second surface opposite the first surface, the second surface having a second surface shape, wherein the first and second surfaces are aspherized to reduce both a component of optical power and reduce a measure of distortion of the lens such that the first surface includes a point of maximum curvature and the curvature of the first surface measured along a line between the point of maximum curvature and any other point on the first surface decreases by at least 1.5 diopters at a distance 15 mm from the point of maximum curvature, the first and second surface shapes define at least a portion of the lens having a diameter of at least 30 mm such that the portion includes the point of maximum curvature of the first surface, a component of an optical power of the lens varies by less than 0.03 diopters over the portion, and a measure of distortion of the lens varies by 0.1% or less over the portion.