contact lences that change to color alert diabetic

There is great news for diabetics. A revolutionary technology has came into being to help them measure blood sugar levels without drawing blood daily. It uses extremely small nanoparticles embedded into the hydrogel lenses. These engineered nanoparticles react with glucose molecules found in tears, causing a chemical reaction that changes their colour. Developed by biochemical engineering professor Jin Zhang at the University of Western Ontario. (Via ImpactLab).