Google is currently testing a smart contact lens built to measure glucose levels in tears by use of a tiny wireless chip and miniaturized glucose sensor embedded between two layers of soft contact lens material.

They say that they are testing prototypes that can generate a reading every second. In addition, they report that they are investigating the contact lenses to serve as an early warning for the wearer, by integrating tiny LED lights that could light up to indicate that glucose levels have crossed above or below certain thresholds.

Currently in discussions with the FDA, they report that they plan to look for partners who are experts in bringing products like this to market.