Google patents smart contact lens which detects glucose levels in tears.

The patent, which was discovered by WebProNews, features a sensor in the lens. Google has previously said that it is partnering with the pharmaceutical company Novartis to create a smart contact lens that could monitor blood sugar for people with diabetes.

The lenses contain a tiny sensor that relays data on glucose contained in tears via an equally tiny antenna. In a news release earlier this year, Google described the electronics in the lenses as being "so small they look like bits of glitter" and said the antenna is thinner than human hair.