Solar Powered Retinal Implant
Artificial retinal implants have always had the problem of knowing where to get the power. You can't exactly stick a big battery or power cord inside your eye. A solution that has worked, in research, is a photovoltaic powered retina. Here is a link to an article about solar retinal implants: http://www.inhabitat.com/2009/12/29/mini-photovoltaic-device-give-sight-to-the-blind/
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