Scientists at the University of Akron, USA have announced a new color-changing lens that can detect glucose levels in tears.These lens will help the diabetic patients to check blood sugar levels without frequently pricking their skin to check sugar level. The lens can sense glucose in tears and reveal the information. The scientists have involved the molecule called probe that binds with sugar and is combined with a dye. As sugar concentration rise it binds with probe and knocks the dye, causes the color change. By detecting the level of change in color we can check sugar levels in body.