A former science teacher who's been blind for 16 years was able to see letters and discern object's edges, and American and Spanish researchers say the experiment shows that implants can restore functional sight for people who have lost vision. A microelectrode array implanted in her visual cortex was paired with a video camera mounted in the center of a pair of glasses. After a training period to learn how to interpret the signals from the electrodes, Berna Gmez was able to decipher visual information fed from the camera directly to her brain. She had the implant for six months and experienced no disruptions to her brain activity or other health complications, the researchers say.

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