The patient would wear a special set of glasses with a small digital camera mounted in the lens. The camera would have a wire that communicates to an external signal processor that in turn would translate the camera image into neural impulses and transmit them wirelessly to an implanted stimulator. The stimulator would drive an electrode, surgically placed in the brain, delivering images to the visual system. Credit: John Pezaris, adapted with permission from D.H. Hubel