TED-Ed: Sajan Saini: How light technology is changing medicine

The video explains how pulse oximeters measure blood oxygen levels using light absorption by hemoglobin. It addresses challenges in measurement due to varying blood vessel sizes and introduces solutions using infrared light. The video also explores integrated photonics and ring resonators for precise chemical fingerprinting. It envisions future labs-on-a-chip for non-invasive medical diagnostics using saliva and sweat. The conclusion highlights the repurposing of light for technological and medical advancements.

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