Baby steps.
Laser-powered bionic eye that gives 576 pixel grayscale vision to the blind

"The only thing worse than being blind is having sight but no vision." - H. Keller

The Bio-Retina plops a 24×24 resolution sensor right on top of the damaged retina, and 576 electrodes on the back of the sensor implant themselves into the optic nerve. An embedded image processor converts the data from each of the pixels into electrical pulses that are coded in such a way that the brain can perceive different levels of grayscale. &

The first clinical trials on humans are scheduled for 2013...

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