Let it be

lickystickypickyme:

Jin Zhang, a professor at the University of Western Ontario, is developing contact lenses that change color with the user’s blood sugar level. This could allow diabetics to monitor themselves without frequent blood samples. The technology:

” …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.” Source