Now, Test Glucose With Contact Lens

Scientist has developed a new technology that could allow non-invasive testing for glucose via a contact lens that samples its levels in tears. Blood testing is the standard option for checking glucose levels. There’s no noninvasive method to do this. It always requires a blood draw. This unfortunately the state of the art. However, glucose is a good target for optical sensing, and especially from what is known as surface-enhanced Raman scattering spectroscopy. This is an alternative approach, in contrast to a Raman spectroscopy based noninvasive glucose sensor researcher developed. Researchers developed a tiny device, built from multiple layers of gold nanowires stacked on top of a gold film and produced using solvent assisted nanotransfer printing, which optimized the use of surface enhanced Raman scattering to take advantage of the technique’s ability to detect small molecular samples. The device enhances the sensing properties by creating narrow gaps within the nanostructure which intensify the Raman signal. The contact lens concept is not unheard of – Google has submitted a patent for a multi sensor contact lens – which is said to have various other applications too.