Patent ID: 8998409
Filing Date: 2015-04-07
Classification: G02C

Abstract:
1. A method for creating a progressive spectacle lens design and manufacturing a progressive spectacle lens, comprising: defining a starting design that comprises specification of a principal line, specifications for target astigmatism values A(u=0,y) along the principal line, and specifications for the course of at least one base target isoastigmatism line, which is described by a one-dimensional function of the form u modifying the course of the base target isoastigmatism line u calculating the target astigmatism values A(u,y) of the spectacle lens design by an interpolation between the target astigmatism values A(u=0,y) on the principal line and the target astigmatism values A(u′ wherein U designates the horizontal distance from the principal line of a point (u,y) of the spectacle lens design, y designates the vertical coordinate of the point (u,y) of the spectacle lens design, u u′ manufacturing, based on the target astigmatism values, the progressive spectacle lens.