X-Ray Eyes: Scientists claim to have cracked the code on infrared vision. They’ve developed contact lenses that convert near-infrared light into visible wavelengths, giving humans the ability to see infrared even in the dark or when they have their eyes closed. In human trials, participants detected Morse-code-like flickering from infrared LED sources and were able to determine signal direction — potentially opening new applications in security, rescue operations, encryption, and assistance for the visually impaired.
https://interestingengineering.com/innovation/contact-lenses-let-humans-see-infrared