A method for determining a specific near vision power of an ophthalmic lens to be provided to a wearer having an ophthalmic prescription, the specific near vision power being for near distance vision, the method comprising: -an ophthalmic lens providing step during which at least an ophthalmic lens having a near distance vision zone comprising a mean power adapted for near distance vision is provided to the wearer, -a near vision task speed determining step during which the processing speedof a near vision task by the wearer when wearing said provided ophthalmic lens is determined, wherein the ophthalmic lens providing step and the near vision task speed determining step are repeated with ophthalmic lenses having different mean power, so as to determine a specific near vision power corresponding tothe mean power providing an improved near vision task processing speed.
