Lasers may soon make painful pin pricks history for diabetics

August 22, 2014 7:24 AM

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The researchers from Princeton University described that they measured blood sugar by directing their specialized laser at a person's palm. The laser passes through the skin cells, without causing damage, and was partially absorbed by the sugar molecules in the patient's body. The researchers use the amount of absorption to measure the level of blood sugar.

The key to the system was the infrared laser's frequency. What our eyes perceive as color was created by light's frequency. Red would be the lowest frequency of light that humans normally can see, and infrared's frequency was below that level. Current medical devices often use the "near-infrared". T...

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