Eyes are supposed to be windows to the soul -- but they make even better mirrors. And what they reflect will astonish you.
Researchers studying the incredible level of detail in modern digital photographs were able to pick out the tiny reflections of faces hidden in the eyes of the subject. By zooming in on the subject's eyes in high-resolution, passport-style photographs, they were able to pick out the faces and accurately identify them.
"The pupil of the eye is like a black mirror," said Rob Jenkins, of the Department of Psychology at the University of York. "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."
Working with Christie Kerr, of the School of Psychology, University of Glasgow, Jenkins recovered the images of bystanders that were as small as 27 pixels across (1 megapixel is about a million pixels). Yet when presented to panelists in a face-matching task, observers were able to match the diminutive faces 71 percent of the time. When the faces were familiar ones, people recognized identity correctly 84 percent of the time.