Bionic Eye Lets Blind Man See Again
The Argus II system consists of a pair of glasses with a small video camera mounted on it, which captures images. A prosthesis no larger than a pencil eraser is surgically implanted on the surface of the retina and information from the camera is transmitted wirelessly to electrodes on the artificial retina, where it is converted to electrical pulses.
It has successfully been implanted, now, in 2 patients in the US, both with an eye disease known as retinitis pigmentosa. The vision provided with the prosthesis is far from perfect, however, it offers hope to many.