METHOD FOR CALCULATING A SPECTACLE LENS WITH IMPROVED NEAR ZONE

摘要

The invention relates to the optimization and production of a spectacle lens for a defined use situation in order to correct at least one astigmatic refraction of an eye of a spectacle wearer, which astigmatic refraction has a cylinder reference value z0 and a cylinder reference axis a0 in a reference viewing direction -ez of the eye, comprising a calculation and optimization step of the spectacle lens, which step comprises the following: defining of an object distance ai for at least one assessment point ib of the spectacle lens; determining of a transformed astigmatic refraction for the at least one assessment point ib of the spectacle lens from the cylinder reference value z0 and the cylinder reference axis a0 as a function of the defined object distance ai; and optimizing of the spectacle lens in such a way that a correction of the transformed astigmatic refraction by the spectacle lens in the defined use situation is taken into consideration for the at least one assessment point ib, wherein the determining of the transformed astigmatic refraction comprises determining of a transformed cylinder value Zi and/or a transformed cylinder axis ai in a defined way as a function of the defined object distance ai.