Fig. 1

Examples of patterned phosphenes. a: Possible perception generated by stimulating simultaneously 4 electrodes arranged as a square. b: The neural plasticity of the visual system can contribute to ever-improving correlation between the physical world and evoked phosphenes. Immediately after implantation the evoked phosphenes are likely to induce a poor perception of an object (the letter “E” in this example). However, appropriate learning and rehabilitation strategies will contribute to provide concordant perceptions