| 摘要 |
A method for calculating a customized progressive addition surface S' ' ' of a progressive addition lens (PAL) made of a material having an optical index of n, the method, comprising at least the successive steps of : a) providing N initial progressive addition surfaces where N = 1, b) calculating N intermediate surfaces S'k by flattening each initial progressive addition surfaces Sk, c) calculating a transformed intermediate surface S' ', d) calculating the customized progressive addition surface S' ' ' by cambering the transformed intermediate surface S' '. |
