> Writing in the journal Cell[0], the scientists describe how they made soft contact lenses seeded with upconversion nanoparticles. When worn, people could see Morse code-like signals flashed from an infrared LED and tell what direction infrared light came from.
> Their infrared vision improved when they closed their eyes, because eyelids block visible light more than infrared, so there was less visible light to interfere
> Writing in the journal Cell[0], the scientists describe how they made soft contact lenses seeded with upconversion nanoparticles. When worn, people could see Morse code-like signals flashed from an infrared LED and tell what direction infrared light came from.
> Their infrared vision improved when they closed their eyes, because eyelids block visible light more than infrared, so there was less visible light to interfere
[0] https://www.cell.com/cell/fulltext/S0092-8674(25)00454-4