Scientists have come up with new technology that allows you test your glucose levels via contact lens that samples tears. Yes you read it right!
Blood testing is the most common and standard way of checking glucose level. "There's no non-invasive method to do this. It always requires a blood draw. This is unfortunately the state of the art," said WeiChuan Shih, from the University of Houston in the US.
He said "However, glucose is a good target for optical sensing, and especially for what is known as surface-enhanced Raman scattering spectroscopy, told Shih, who worked with colleagues at UH and in Korea to develop the project."
The researchers said "this lens test is a new alternative approach in contrast to a Raman spectroscopy-based noninvasive glucose sensor Shih developed as a PhD student at the Massachusetts Institute of Technology. Researchers made a tiny device, built from multiple layers of gold nano-wires stacked on top of a gold film and produced using solvent-assisted nanotransfer printing, which optimised the use of surface-enhanced Raman scattering to take advantage of the technique's ability to detect small molecular samples. The device increases the sensing properties by creating narrow gaps within the nanostructure which intensify the Raman signal."
The contact lens concept is not unheard as Google has submitted a patent for a multi-sensor contact lens which is said to have various other applications too.
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BY M. DIVYA SRI