Like the snowflake and ice crystal, the human iris is considered to be absolutely unique with a probability of two iris (irides) being identical at 1 in 10⁷⁸.

Iris scanning, also referred to as iris recognition, is rapidly becoming a cost effect Biometric solution. Iris scanning, generally conceded as one of the most accurate of all Biometric technologies, is also gaining broad range acceptance for its speed, scalability and user friendly qualities. Iris scanning is also a stable technology from a physiological perspective as the human iris formed during the fetal gestation period of 7-8 months remains constant thought a person's lifetime.