Bionic Eye Replaces Retina

The company Second Sight has developed a bionic eye called the Argus II. The eye uses implanted electrodes to replace a malfunctioning retina. So far, the device has been implanted in 18 patients around the world.

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.

The hope is that patients will learn to interpret the visual patterns produced into meaningful images.

The BBC followed a 73-year-old patient named Ron who received an Argus II.

"For 30 years I've seen absolutely nothing at all, it's all been black, but now light is coming through. Suddenly to be able to see light again is truly wonderful.

"I can actually sort out white socks, grey socks and black socks."

Link -via reddit