One of the biggest Internet companies has developed the smallest blood sugar reader.

Diabetes is a disease without borders — one in 19 people across the globe deal with this illness that requires constant blood measurements and insulin treatment. Google might soon make day-to-day care a little easier for diabetics with contact lenses that can read a person's blood sugar through their tears – bringing new meaning to the popular wearable tech trend.

Understanding diabetes is key to comprehending why this technological advancement is so important. Someone who is diabetic cannot produce their own insulin, meaning sugar remains in their blood. The disease has two types: Type 1, which is a chronic, life-long condition, and Type 2, which can occur at any age due to specific factors but can be cured with medication and changes in lifestyle. Diabetes requires a number of expensive medical supplies, including a blood sugar monitor, test strips, vials of insulin with needles, a device to pierce the skin to extract blood, or an insulin pump attached directly to the body. Failure to deal with spikes in blood sugar can lead to possibly fatal organ damage, but the process requires time and can be painful.

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