A method implemented by computer means for processing an unfinished optical lens member for manufacturing an optical lens, the unfinished optical lens member having an unfinished surface and an aspherical finished surface having a first reference system with a first reference point and the optical lens to be manufactured having a first and a second surfaces, the first surface comprising a second reference system with a second reference point and being comprised in the aspherical finished surface of the lens member, the method comprising: - an unfinished optical lens member data providing step, during which a set of data for the lens member is provided, the data comprising at least an unfinished optical lens member dataset representative of the aspherical finished surface of the lens member in the first reference system; - an optical function providing step, during which an optical function of the optical lens to be manufactured is provided, the optical function corresponding to a function providing for each gaze direction the effect of an optical lens on the light ray passing through the optical lens; - a reference point position providing step, during which a position of said second reference point on said first surface is provided; - an optical lens parameter providing step, during which at least an optical lens parameter is provided, the optical lens parameter being distinct from the optical function of the optical lens; - a reference system determining step, during which at least the position and/or orientation of a second reference system with respect to said first reference system is determined based at least on the optical lens parameter and on the set of data for the lens member by positioning and/or orienting the second reference system with respect to the first reference system; - a first surface dataset determining step, during which at least a first surface dataset defining the first surface within the second reference system is determined based on the unfinished optical lens member dataset and the optical lens parameter; and - a second surface dataset determining step, during which for each determined first surface dataset, a second surface dataset defining the second surface within the second reference system is determined based on the dataset representative of the aspherical finished surface of the lens member and on the optical function of the optical lens to be manufactured. - an unfinished optical lens member data providing step, during which a set of data for the lens member is provided, the data comprising at least an unfinished optical lens member dataset representative of the aspherical finished surface of the lens member in the first reference system; - an optical function providing step, during which an optical function of the optical lens to be manufactured is provided, the optical function corresponding to a function providing for each gaze direction the effect of an optical lens on the light ray passing through the optical lens; - a reference point position providing step, during which a position of said second reference point on said first surface is provided; - an optical lens parameter providing step, during which at least an optical lens parameter is provided, the optical lens parameter being distinct from the optical function of the optical lens; - a reference system determining step, during which at least the position and/or orientation of a second reference system with respect to said first reference system is determined based at least on the optical lens parameter and on the set of data for the lens member by positioning and/or orienting the second reference system with respect to the first reference system; - a first surface dataset determining step, during which at least a first surface dataset defining the first surface within the second reference system is determined based on the unfinished optical lens member dataset and the optical lens parameter; and - a second surface dataset determining step, during which for each determined first surface dataset, a second surface dataset defining the second surface within the second reference system is determined based on the dataset representative of the aspherical finished surface of the lens member and on the optical function of the optical lens to be manufactured.