The Bionic Eye developed by US experts has been successful in partially restoring the eyesight of blind patients. It works by converting images from a tiny camera mounted on pair of glasses into a grid of 16 electrical signals that transmit directly to the nerve endings in the retina.
An implant wirelessly receives the data and sends the signals through a tiny cable to an electrode array. The electrode array is then simulated to emit electrical impulses, which induce responses in optic nerve to the brain, making the blind patient see objects like shadows.
In fact,the bionic eye is so effective that the subject can tell the difference between a cup,a plate or a knife. They can also tell which direction the object are moving in front of them.