Method and system for determining a lens of customized color

A system for determining a lens of customized color comprising:

• an input device for determining a target colorimetric data set;
• a computer system comprising a database comprising data representing colors;
• and
• a plurality of simulation modules,
• wherein said data comprise:
• colorimetric data corresponding to a plurality of multilayer stacks of determined layers composition and thicknesses and said data comprising reflection, transmission, absorption and/or scattering coefficients of a lens substrate and, respectively, of a plurality of dyes, over a range of wavelengths, and wherein the plurality of simulation modules comprises a first simulation module adapted to calculate, based on said data from the database, a first plurality of simulated colorimetric data of a lens substrate combined with a mixture of dyes with a multilayer stack as a function of determined layers composition and thicknesses and wherein the plurality of simulation modules comprises at least another simulation module adapted to calculate another plurality of simulated colorimetric data comprising a plurality of simulated reflection, transmission or absorption spectra of the lens substrate combined with a mixture of dyes as a function of varying determined dye(s) combination, composition and amount;
• the plurality of simulation modules being adapted to evaluate a numerical difference between the first plurality of simulated colorimetric data and the target colorimetric data set and respectively between the another plurality of simulated colorimetric data and the target colorimetric data set so as to determine a plurality of combinations, said plurality of combinations comprising at least one combination of said lens substrate with a determined multilayer stack and at least another combination of said lens substrate with a determined mixture of dyes, the plurality of combinations matching the target colorimetric data set, and wherein the computer system is connected to a display device adapted to display rendered colors in reflection and transmission for each of said plurality of combinations so as to enable visual comparison in rendered colors.