Patent ID: 9022559
Filing Date: 2015-05-05
Classification: G02C

Abstract:
1. A progressive-power lens manufacturing method for manufacturing a progressive-power lens having two distinct vision points and at least one quasi-distinct vision point, the method comprising: setting priorities among at least three target objects viewed through the progressive-power lens; assigning a point on the progressive-power lens through which a target object having a third or lower level of the priorities is viewed as the quasi-distinct vision point and setting an optimization coefficient for the target object based on the distance between the quasi-distinct vision point and the target object and the magnitude of change in the distance; setting dioptric power necessary at the quasi-distinct vision point by using a predetermined method; optimizing the amounts of aberrations and a dioptric power error at the quasi-distinct vision point based on the optimization coefficient and the dioptric power; and manufacturing the progressive-power lens having the quasi-distinct vision point and the dioptric power set in the above steps.