A computer implemented method for designing a progressive lens, the method comprising: (a) obtaining (step 12) a wavefront measurement of an eye, the wavefront measurement comprising information about second order aberrations of the eye and about higher order aberrations of the eye; (b) extracting (step 14) said information about second order aberrations of the eye and said information about higher order aberrations of the eye from said wavefront measurement and establishing a second order correction for the aberrations of the eye; (c) calculating (step 16) the effect of changes in one or more higher order aberrations of the eye to the second order correction established in (b) for the aberrations of the eye; (d) determining (step 18) an initial design for the progressive lens accounting only for the second order correction for the aberrations of the eye based on said information extracted in (b), the initial design comprising, for one or more points on the progressive lens, information about second order aberrations of the progressive lens and higher order aberrations of the progressive lens, the initial design providing a target correction for the eye in the absence of the higher order aberrations of the eye, wherein the target correction comprises the second order correction for the aberrations of the eye; (e) determining (step 20) said higher order aberrations of the progressive lens; (f) determining (step 22) changes to the second order correction perceived by the eye due to the higher order aberrations of the progressive lens determined in (e) based on the effect calculated in (c); (g) modifying (step 24) the initial design for the progressive lens to provide a final design for the progressive lens, wherein the modification accounts for an expected variation of the correction from the target correction due to one or more higher order aberrations of the initial design for the progressive lens and the changes determined in (f); and (h) outputting (step 26) the final design. (a) obtaining (step 12) a wavefront measurement of an eye, the wavefront measurement comprising information about second order aberrations of the eye and about higher order aberrations of the eye; (b) extracting (step 14) said information about second order aberrations of the eye and said information about higher order aberrations of the eye from said wavefront measurement and establishing a second order correction for the aberrations of the eye; (c) calculating (step 16) the effect of changes in one or more higher order aberrations of the eye to the second order correction established in (b) for the aberrations of the eye; (d) determining (step 18) an initial design for the progressive lens accounting only for the second order correction for the aberrations of the eye based on said information extracted in (b), the initial design comprising, for one or more points on the progressive lens, information about second order aberrations of the progressive lens and higher order aberrations of the progressive lens, the initial design providing a target correction for the eye in the absence of the higher order aberrations of the eye, wherein the target correction comprises the second order correction for the aberrations of the eye; (e) determining (step 20) said higher order aberrations of the progressive lens; (f) determining (step 22) changes to the second order correction perceived by the eye due to the higher order aberrations of the progressive lens determined in (e) based on the effect calculated in (c); (g) modifying (step 24) the initial design for the progressive lens to provide a final design for the progressive lens, wherein the modification accounts for an expected variation of the correction from the target correction due to one or more higher order aberrations of the initial design for the progressive lens and the changes determined in (f); and (h) outputting (step 26) the final design.