The document discusses a smart contact lens being developed by Google to help people with diabetes. The lens would monitor glucose levels in tears using sensors, transmit the data to a mobile device, and provide continuous readings. It would also use LED lights to warn of dangerously high or low glucose levels. This would be less painful than traditional finger pricking methods. Advantages of the smart lens include painless continuous monitoring, mobility, accuracy, and reusability. Future enhancements could allow remote monitoring, insurance compliance, data collection, and real-time insulin dosage adjustment.