Key points from article :
Blind people can detect motion, distinguish light and dark with a wireless device.
Device is geared to people who used to be able to see but lost their vision to injury or disease.
Images are captured by a tiny video camera mounted on sunglasses.
Captured images convert into a series of electrical pulses, which stimulate implanted electrodes.
Along with the glasses, the system also includes a belt equipped with a button.
Six people who received the implant are very satisfied with the result.
Research has done by scientists at UCLA Health.
