Biosensor-equipped glasses could monitor diabetes through tears

Brazilian and US scientists have developed a glasses-based biosensor capable of measuring blood glucose levels through a person’s tears, offering a less invasive test for diabetics. Glucose levels need to be frequently monitored in people with diabetes, a disease that affects 62 million people in the Americas and 380 million worldwide. According to the World Health Organization (WHO), diabetes has been rising alarmingly in recent decades — with the fastest increase in low-