morphological study of iris print

ABSTRACT

This work was done on 500 phenotypically normal individuals from El Gharbia Governorate with healthy eyes, as a sample of Egyptian population, to study the different patterns of iris prints as a new rapid visual recognition method used for personal identification. The irises revealed trabecular meshwork of ridges, enclosing spaces or depressions in-between. The radially arranged ridges in the pupillary zone peripherally joined in certain manners, to form 1-3 arcade tiers ended by a collarette of variable degree of corrugation, which demarcate the pupillary from the ciliary zone. The latter, revealed larger ridges forming larger arcades, in both zones, the arcades enclosed spaces of variable shapes. So many points of comparison were obtained, depending on the collarette shape as well as the differences in the ridge arrangement, direction, apparent length and width, site of branching and number of arcade tiers. Too the differences in depression arrangement, depth, size and shape. Combination of such variables in different manners constitutes distinctive prints, with highly visible patterns and unique minutiae, which are specific for every person. This relatively new biometric has many properties, which enhance its use, as a successful identifying technique for bank security, entrance authorization for restricted areas, Olympic games and replace or supplement personal identification number, passwords and access cards. Additionally, it may be used for positive identification of high-value animal for racing or breeding