Google reveals smart contact lens prototype designed to aid diabetics

Google unveils a contact lens that monitors glucose levels in tears, something millions of diabetics currently have to draw their own blood to check

The lenses use a minuscule glucose sensor and a wireless transmitter to help those among the world’s 382m diabetics who need insulin keep a close watch on their blood sugar and adjust their dose.

The prototype, which Google says will take at least five years to reach consumers, is one of several medical devices being designed by companies to make glucose monitoring for diabetic patients more convenient and less invasive than the traditional blood-drawing finger pricks.

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