A method implemented by computer means for optimizing an ophthalmic lens design, the method comprising an assessing of at least a selected optical feature of an ophthalmic lens design over a prescription and optionally design particularity domain, comprising the steps of: a) selecting a prescription and optionally design particularity parameters set comprising a plurality of prescription parameters in the list consisting of spherical power, cylindrical power, cylinder axis, addition power with the proviso that the ophthalmic lens is a progressive addition lens and selecting a prescription and optionally design particularity range for each selected prescription and optionally design particularity parameter so as to define the prescription and optionally design particularity domain; b) meshing the prescription and optionally design particularity domain so as to obtain a representative sample of coordinates within the prescription and optionally design particularity domain and thus providing a plurality of meshing coordinates where each coordinate consists of a series of values of the selected prescription and optionally design particularity parameters within their prescription and optionally design particularity range; c) providing an assessment criterion for the selected optical feature of the ophthalmic lens design; d) calculating the assessment criterion value for each meshing coordinate of step b); e) providing a visual representation of the assessment criterion values over the prescription and optionally design particularity domain, and wherein, for optimizing an ophthalmic lens design, the method further comprises the steps of: - providing a given ophthalmic lens design; and - modifying a design parameter of the given design so as to provide a modified design and comparing the modified design with the given design and evaluating the modified design, thanks to said assessing performed in steps a) to e). a) selecting a prescription and optionally design particularity parameters set comprising a plurality of prescription parameters in the list consisting of spherical power, cylindrical power, cylinder axis, addition power with the proviso that the ophthalmic lens is a progressive addition lens and selecting a prescription and optionally design particularity range for each selected prescription and optionally design particularity parameter so as to define the prescription and optionally design particularity domain; b) meshing the prescription and optionally design particularity domain so as to obtain a representative sample of coordinates within the prescription and optionally design particularity domain and thus providing a plurality of meshing coordinates where each coordinate consists of a series of values of the selected prescription and optionally design particularity parameters within their prescription and optionally design particularity range; c) providing an assessment criterion for the selected optical feature of the ophthalmic lens design; d) calculating the assessment criterion value for each meshing coordinate of step b); e) providing a visual representation of the assessment criterion values over the prescription and optionally design particularity domain, - providing a given ophthalmic lens design; and - modifying a design parameter of the given design so as to provide a modified design and comparing the modified design with the given design and evaluating the modified design, thanks to said assessing performed in steps a) to e).