Scientists have described their first complete design of an implant that will take the place of light-sensitive cells in the retina of a damaged eye.

Current implants use chips that convert light into electrical impulses that are fed to the brain via the optic nerve.

The new device will work differently. It will be placed on a damaged retina and convert light into chemicals that will stimulate nerve cells.

The prototype is being constructed at Stanford University in California.

New approach

Dr Stacey Bent of Stanford University calls the device "the holy grail of prostheses". It takes a new approach to replacing a damaged retina, the layer of cells at the back of the eye that detect light and send signals to the brain.

Trauma or disease can damage or destroy retinal cells. Over the past few years implants have been developed to replace them based on electronic chips that turn light into electrical pulses.


View: Full Article | Source: BBC News