Patent ID: 8494809

Claim:
A method for computer-assisted evaluation of performance of progressive lenses carried out on a computer processor and based on individual parameters of a given eyeglass wearer, the individual parameters including at least personal prescription data, the method comprising: determining the individual parameters; calculating, using the computer processor, a total performance factor P in each case for at least two quality classes of progressive lenses as a function of the individual parameters, the total performance factor P being correlated with at least one of a quality of monocular visual acuity or binocular visual impression; and outputting the total performance factor P for the at least two quality classes; wherein the personal prescription data include a spherical power Sph and a magnitude Ast of an astigmatic power; the total performance factor P is obtained by multiplying a first performance factor P 1 (Sph) by a second performance factor P 2 (Ast); the first performance factor P 1 is a function P 1 ⁡ ( Sph ) = ∑ i = 0 N ⁢ a i * Sph i of the spherical power Sph; the second performance factor is a function P 2 ⁡ ( Ast ) ⁢ ∑ i = 0 N ⁢ b i * Ast i of the magnitude Ast of the astigmatic power; and coefficients a i are N-order polynomial functions of the magnitude Ast of the astigmatic power, and coefficients b i are N-order polynomial functions of the spherical power Sph.