"The pupil of the eye is like a black mirror," said Dr. Rob Jenkins, a psychologist at the University of York. Dr. Jenkins' research shows people's faces reflected in other people's pupils are enough for accurate facial recognition.
He and co-researcher, Christie Kerr, from the School of Psychology at the University of Glasgow, proved this by zooming in on high-resolution passport-style photos. They collected images of the faces reflected in the eyes. When they showed these images to other people, they were able to accurately match faces up to 84 percent accuracy.
"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," Dr. Jenkins said. "Our findings thus highlight the remarkable robustness of human face recognition, as well as the untapped potential of high-resolution photography.”