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Elias Konstantopoulus runs through an optics test with his "bionic" eye glasses during a session at the Lions Vision Research and Rehabilation Center at Johns Hopkins University in Baltimore, Maryland. Konstantopoulus is blind but working with Johns Hopkins University he has been implanted with a microchip and given a set of glasses that enable him to distinguish between light and dark.

A "bionic" leg designed for people who have lost a lower leg is undergoing clinical trials sponsored by the US Army. The researchers hope the leg will be able to learn the patient's nerve signal patterns and be able to move in response to the patient's own muscles and nerves.