Photos: Biometrics up close and personal

The subject's pupils are recorded and the data is stored for later comparison. The error rate of iris recognition is 0.001 percent, or 1 in 100,000 people with false positive or negative results, according to Bataller. The error rate for ten fingerprints is 0.01 percent and for one fingerprint, 0.1 percent. In contrast, facial recognition software generally has a 5 to 10 percent error rate.