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- and middle-income countries — and could affect 580 million people by 2035. Many people with the disease use a portable glycosometer to measure blood glucose levels by pricking their…
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