Science textbooks say we can’t see infrared light. Like X-rays and radio waves, infrared light waves are longer than the light waves in the visual spectrum. But an international team of researchers co-led by Frans Vinberg, PhD, (left) and Vladimir J. Kefalov, PhD, has found that under certain conditions, the retina can sense infrared light after all.
Thats mostly because the vast majority of IR lights and led’s also emit visable light. To get an ir light to not also emit within the visable light spectrum is much more expensive.