Iridology(also known asiridodiagnosisoriridiagnosis) is analternative medicinetechnique whose proponents claim that patterns, colors, and other characteristics of theiriscan be examined to determine information about a patient'ssystemichealth. Practitioners match their observations toiris charts,which divide the iris into zones that correspond to specific parts of the human body. Iridologists see the eyes as "windows" into the body's state of health.
Iridologists claim they can use the charts to distinguish between healthy systems and organs in the body and those that are overactive, inflamed, or distressed. Iridologists claim this information demonstrates a patient's susceptibility towards certain illnesses, reflects past medical problems, or predicts later health proble.
The features of the iris are one of the most stable features on the human body throughout life.[disputed–discuss]The stability of iris structures is the foundation of thebiometrictechnology which usesiris recognitionfor identification purposes.