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In this photo from Jan. 15, 2014, Brian Otis, Google X project lead, speaks about a contact lens Google is testing to explore tear glucose in Mountain View, Calif. The contact lens is designed to monitor glucose levels in tears, a potential reprieve for millions of diabetics who have to draw their own blood as many as 10 times a day. (AP Photo/Jeff Chiu)

In this photo from Jan. 15, 2014, Brian Otis, Google X project lead, speaks about a contact lens Google is testing to explore tear glucose in Mountain View, Calif. The contact lens is designed to monitor glucose levels in tears, a potential reprieve for millions of diabetics who have to draw their own blood as many as 10 times a day. (AP Photo/Jeff Chiu)

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