Iris has many properties which make it ideal
biometric recognition. The iris is a thin circular
structure in the eye. Iris region is the part between
the pupil and the white sclera. The human iris is not
changeable and is stable. From one year of age until
death, the patterns of the iris are relatively constant
over a person’s lifetime. Its high uniqueness and
stability makes it a good biometrics that can be used
for identifying individuals. Iris not only differs
between identical twins but also from left to right eye.
Iris begins to form in the third month of gestation
and the structures creating its pattern are largely
complete by the eight month. Compare iris biometric
from Other biometric technologies, such as face,
speech and finger recognition, iris recognition can
easily be considered as the most reliable form of
biometric technology. We can classify the Biometric
techniques into classes: