Eye pattern identification takes into account the iris or retinal measurements of the eye. Retinal scans shoot a low-intensity beam of light into the eyeball and record the pattern of veins in the eye. Retinal scans are one of the most accurate performers, with low reject rates and nearly a zero percent false accept rate. Iris eye measurement uses a camera to photograph the iris in the front of the eye. Unlike retinal patterns, which can change over time, the iris is unique, much like a fingerprint.
Subjects are able to stand as far as three feet from the camera.
A digital code, based upon the individual pattern of the iris, is created. Its distinct template can be compared to a stored database. This system is now being utilized on ATM machines in London, England. The New York State Lottery ticket archive utilizes the iris scan, as did the Nagano Olympic officials for rifle security for their biathletes. Facial recognition is by far the easiest and the most intuitive to use since it is as simple as having a picture taken.