Abstract: The present invention relates to a method and a device for visualising an image by electrical stimulation of functional parts of a visual system. A method according to the present invention comprises an image provision step for providing an image to be visualised by the visual system, a selection step for selecting, from a phosphene data file comprising a description of phosphenes and the stimuli characteristics needed for obtaining them, a number of most appropriate phosphenes to be generated for visualising the image, so that the image is transferred into a summation of patches of light, and a stimulation step for stimulating functional parts of the visual system so as to generate the selected phosphenes. This way, a pixel based image is converted into a plurality of patches of light. A device for carrying out the method is also described.