The present invention relates to a process for training the visual system of a human by presenting optical stimuli to said human, said stimuli being presented to a zone within the intact visual field of said human and optionally to a zone outside the intact visual field of said human, one of said zones comprising a zone to be trained, thereby allowing an improvement of the vision in general, said process comprising the steps of (a) locating and defining a zone of intact vision and optionally a zone of deteriorated vision or residual visual function or partial visual system injury ("transition zone") within the human's visual system; (b) defining a training area which is located within at least one of said zones including the zone of intact vision; (c) training the human's visual system by presenting visual stimuli to the human's visual system, at least a part of said visual stimuli being presented in or near said zone of intact vision; (d) recording changes in the characteristics of the human's visual system; (e) adapting the location and definition of the stimulus presentation to said at least one zone, including the zone of intact vision, according to said changes; and (f) reiterating the previous steps continuously so as to improve the human's overall visual system. The invention also relates to a device for performing said process.