LENS DESIGN METHOD, LENS FABRICATION METHOD, LENS DESIGN PROGRAM AND LENS DESIGN SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a lens design method that is high in a degree of freedom of a thickness at each location of a spectacle lens.SOLUTION: A lens design method comprises: varying curve data including a curve value of a far-sight part and a curve value of a near-sight part which are on an object side of a progressive refractive index lens, and a curve value of a far-sight part and a curve value of a near-sight part which are on an eyeball side thereon so as to match a prescription value, and calculating a plurality of sets of curve data (S4); and calculating a thickness at a second location on the progressive refractive index lens when satisfying a thickness condition at a first location on the progressive refractive index lens relative to each of the plurality of sets of calculated curve data (S6).