1. What
   1. an automated method of biometric identification that uses mathematical pattern-
   2. recognition techniques on video images of the irides of an individual's eyes
   3. whose complex random patterns are unique and can be seen from some distance
2. Advantages
   1. well protected against damage and wear by a highly transparent and sensitive membrane
   2. iris shape far more predictable
   3. similar to taking a photograph and can be performed from about 10cm to a few meters away
   4. non-invasive, as it does not use any laser technology, just simple video technology
   5. It poses no difficulty in enrolling people that wear glasses or contact lenses
3. Disadvantages
   1. relatively new technology and is incompatible with the very substantial
   2. very difficult to perform at a distance larger than a few meters and if the person to be identified is not cooperating by holding the head still and looking into the camera
   3. very small organ to scan from a distance
   4. susceptible to poor image quality, with associated failure to enroll rates
4. Different
   1. Iris recognition vs fingerprint
   2. Iris recognition vs facial regonition
   3. Iris recognition vs retina scan
   4. Iris recognition vs hand geometry