SPECTACLE LENS EVALUATING METHOD, SPECTACLE LENS DESIGNING METHOD USING SAME, SPECTACLE LENS MANUFACTURING METHOD, SPECTACLE LENS MANUFACTURING SYSTEM, AND SPECTACLE LENS

摘要

Adequate evaluation, designing, and manufacturing are possible by more adequately considering the visual performance. A spectacle lens is evaluated by using a vision function containing a factor representing the physiological astigmatism. The physiological astigmatism is an astigmatism in a phenomenon of an increase of the vision when there is a slight astigmatism in a region where the power of accommodation is lower than that in the region representing the range of the positive relative power of accommodation where the power of accommodation increases among the relative powers of accommodation possible with the convergence unchanged.