It’s hard to be critical towards technology when reading stories such as this. A blind man who has been unable to see for thirty years has got some of his sight back.
The system is called Argus II and is described by BBC as:
It uses a camera and video processor mounted on sunglasses to send captured images wirelessly to a tiny receiver on the outside of the eye. In turn, the receiver passes on the data via a tiny cable to an array of electrodes which sit on the retina – the layer of specialised cells that normally respond to light found at the back of the eye.
When these electrodes are stimulated they send messages along the optic nerve to the brain, which is able to perceive patterns of light and dark spots corresponding to which electrodes have been stimulated.
Totally amazing…