Argus II (the bionic eye name,) is actually a retinal prosthesis made by Second Sight. It receive signals from a camera mounted on a special pair of glasses. The patient must wear this external equipment, for the eye to operate. The implant is an electrode array embedded in the eye's retina, also fitted with a battery and a wireless antenna.
The camera-captured scene, after processing, is sent back to the glasses, that beam the signal to the implant's antenna thanks to their embedded transmitter. At the moment the Argus II implant provides a monochrome vision.
"Mr Flynn's progress is truly remarkable. He is seeing the outline of people and objects very effectively. As far as I am concerned, the first results of the trial are a total success, and I look forward to treating more patients," said Professor Paulo Stanga, a surgeon at Manchester Royal Eye Hospital.
Vision is a very complex process involving various components, and the eye is indeed one of the most fascinating parts of the human body.