A person is able to see infrared light
An international group of scientists from Poland, Switzerland, Norway and the United States established that under certain conditions, people can see infrared light. Using the retinal cells of mice and people, as well as infrared lasers, the researchers found that when laser impulses follow quickly, retinal photosensitive cells sometimes get a double infrared radiation blow. When this happens, the eye is able to detect light, which goes beyond the visible area of the spectrum.