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The device could help diabetics avoid the need to jab their fingers many times a day to monitor their sugar levels.
A new contact lens that monitors glucose levels in tears could help diabetics avoid the pain and inconvenience of having to prick their fingers to draw blood as many as 10 times a day. Nearly 400 million diabetics worldwide have to monitor their blood sugar and tweak their insulin dose to keep their levels under control, or face potentially dangerous complications. The contact lens has been developed by Google at its secretive X lab during the past 18 months. The device looks like a normal contact lens, but inside is a minuscule glucose sensor and wireless transmitter. Sandwiched in the lens are two glitter-specks loaded with tens of thousands of miniaturised transistors, while the lens is ringed with a hair-thin antenna. Shrinking the parts to such a small size was a major task, according to Brian Otis, one of the lead researchers.