In the U.K., scientists are using the human pupil as a crime-fighting tool -- one that allows pinpointing the perpetrators by simply looking more closely at the reflections in their victim's eyes.
As was initially reported in the journal PLOSONE, the researchers wrote that for crimes in which the victims are photographed, such as hostage taking or child sex abuse, reflections in the eyes of the photographic subject could help to identify perpetrators.
“The pupil of the eye is like a black mirror," Dr. Rob Jenkins, a psychologist at the University of York, said in a statement. "To enhance the image, you have to zoom in and adjust the contrast. A face image that is recovered from a reflection in the subject’s eye is about 30,000 times smaller than the subject’s face."