A process implemented by computer means for determining the optical surfaces of a progressive addition lens for a wearer, the method comprising: - a prescription data providing step during which prescription data of the wearer comprising the prescribed addition are provided, - an optical function determining step during which an optical function according to the prescription data is determined, and - a surface determining step during which the surfaces of an optical lens having the previously determined optical function are determined, wherein the optical function corresponds to a virtual progressive lens having: - a first vision zone corresponding to the portion of the progressive addition lens having the dioptric power for the first distance vision corresponding to the prescription data, - a near vision zone corresponding to the portion of the progressive addition lens for near distance vision, - a intermediate corridor corresponding to the portion of the progressive addition lens providing clear vision for ranges intermediates between the first distance and the near distance, wherein the first vision zone is a far vision zone or an intermediate vision zone, - an addition between the first vision zone and the near vision smaller by at least 0.5 diopter in absolute value than the addition of the prescription data, and - wherein for a pupil diameter of 4 mm the modulation transfer function is greater or equal to 0.1 over the range of spatial frequency comprised between 0 and 20 cycles per degree when measured at distances comprised between 0.5 m and 1000 m; and comprising a step so as to increase the depth of focus in the near vision zone chosen within the list consisting of: • during the optical function determining step, geometrical aberrations are added to the virtual progressive lens so as to increase the depth of focus in the near vision zone; • the process further comprises a phase modulation mask determining step during which a phase modulation mask to be added at least in the near vision zone of optical lens so as to increase the depth of focus in the near vision zone is determined. - a prescription data providing step during which prescription data of the wearer comprising the prescribed addition are provided, - an optical function determining step during which an optical function according to the prescription data is determined, and - a surface determining step during which the surfaces of an optical lens having the previously determined optical function are determined, wherein the optical function corresponds to a virtual progressive lens having: - a first vision zone corresponding to the portion of the progressive addition lens having the dioptric power for the first distance vision corresponding to the prescription data, - a near vision zone corresponding to the portion of the progressive addition lens for near distance vision, - a intermediate corridor corresponding to the portion of the progressive addition lens providing clear vision for ranges intermediates between the first distance and the near distance, wherein the first vision zone is a far vision zone or an intermediate vision zone, - an addition between the first vision zone and the near vision smaller by at least 0.5 diopter in absolute value than the addition of the prescription data, and - wherein for a pupil diameter of 4 mm the modulation transfer function is greater or equal to 0.1 over the range of spatial frequency comprised between 0 and 20 cycles per degree when measured at distances comprised between 0.5 m and 1000 m; and comprising a step so as to increase the depth of focus in the near vision zone chosen within the list consisting of: • during the optical function determining step, geometrical aberrations are added to the virtual progressive lens so as to increase the depth of focus in the near vision zone; • the process further comprises a phase modulation mask determining step during which a phase modulation mask to be added at least in the near vision zone of optical lens so as to increase the depth of focus in the near vision zone is determined. • during the optical function determining step, geometrical aberrations are added to the virtual progressive lens so as to increase the depth of focus in the near vision zone; • the process further comprises a phase modulation mask determining step during which a phase modulation mask to be added at least in the near vision zone of optical lens so as to increase the depth of focus in the near vision zone is determined.