Your eyes may be more identifiable than your fingerprints. Iris scanners use mathematical pattern recognition to search for characteristics such as furrows, freckles, rings, and pigmentation in the iris. Because of these markers, irises are about six times more "unique" than fingerprints. Scientists are currently developing scanners that can work at long ranges to identify people by their irises, and law enforcement agencies have built ID databases of irises as well.
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Key Facts In This Video
Police have started to build ID databases using irises. 00:30
Scientists at Carnegie Mellon are working on an iris scanning system that could work from as far away as 12 meters. 00:38
Some people fear that the use of long-range iris scanners could infringe on privacy rights. 01:17