The present disclosure relates to an apparatus (100) for customising an optical lens which comprises an observation unit (130) adapted to acquire at least one of visual activities of a user and viewing distance profiles of the visual activities, a processor (170) adapted to calculate a personal distance profile based on at least one of the acquired visual activities and the acquired viewing distance profiles, and an implementation unit (190) adapted to customise the optical lens based on at least one of the acquired visual activities and the acquired personal distance profile.
