This new retinal implant does not require batteries.
The new bionic eye technology requires a special pair of glasses that beams near infrared light into the eye according to BBC. The glasses carry a video camera that records what is in front of the patient. It transmits that information with near infrared light on the retinal chip. This is creating an electrical signal that is transmitted to the visual nerves. Sounds all pretty complicated and has only been tested on rats so far.
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Watch an overview of the new bionic eye research in a video from Newsy below.