It has long been believed that certain markings in the iris may reveal inherited conditions in a person. These markings may indicate weaknesses that may lead to physical and emotional disorders. Using iridology, an analysis of specific markings can show whether a person exhibits a generally good constitution or a poor one, depending upon the density of the iris fibres, various patterns, structures, colours, and degrees of lightness and darkness in the iris can assist in determining if an area of the body is inherently strong or weak. These signs may also reveal a site of over-activity, irritation, injury or degeneration of the tissues and organs. Accumulation of toxins or poor digestive processes can be observed, as well as nutritional imbalances. Iridology is about uncovering your health history, not diagnosing the present.