http://googleblog.blogspot.com/2014/01/introducing-our-smart-contact-lens.html
Google is testing a smart contact lens that’s built to measure glucose levels in tears. It uses a tiny wireless chip and miniaturized glucose sensor embedded between two layers of soft contact lens material. The prototype can generate a reading once per second. They are investigating the potential of integrating tiny LED lights that could light up to indicate that glucose levels have crossed above or below thresholds. Google says it is working with the FDA to turn the prototypes into products.
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