Patent ID: 8967798
Filing Date: 2015-03-03
Classification: G01M,G02C

Abstract:
1. A method of evaluating eyeglass lenses comprising: setting an optical system including an object, left and right eyeglass lenses and both eyeballs, wherein the object is specified by a visual direction from a midpoint of rotations of both of the eyeballs; calculating a reference value of an angle of convergence with lines of fixation for which a fixation point of the object is set as a viewing direction, the fixation point being an intersection point at which the lines of fixation cross with each other after passing through design reference points of the left and right eyeglass lenses; calculating an angle of convergence with the lines of fixation, the lines of fixation extending to an object evaluation point in an arbitrary viewing angle and passing through the left and right eyeglass lenses; calculating a convergence aberration from a difference between the angle of convergence and the reference value of the angle of convergence; and evaluating the eyeglass lenses using the convergence aberration.