Iris images are acquired, pre-processed, and archived. They are registered together with all relevant patient information. Repeated image acquisition sessions are needed for analysis, both in research for general pattern recognition and in our special differential approach. By our definition, the basis for all subsequent comparisons is the first iris image obtained above a certain pre-defined quality threshold. Different iris images are obtained from the same patient at precisely defined moments, both in general temporal and in specific individual chronobiological terms.
Photo sessions take place in conditions which are kept as constant as possible.
They are also, traditionally, the ones that have been matched with iris charts. For a higher resolution of this photo, click on it or go home , and for more technical comments on the difficulties in iris image acquisition of this kind, please click here . Iris images display patterns that may be compared in time, in health and disease, in genetic and anthropologic studies and in biometry. Our main concern are health correlates of diagnostic value for a given iris image. The method we developed spots specific microchanges in iris patterns during health events.