Iridology (also known as iridodiagnosis or iridiagnosis) is an alternative medicine technique whose proponents claim that patterns, colors, and other characteristics of the iris can be examined to determine information about a patient’s systemic health.
Practitioners match their observations to iris 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.
Further Reading:
Iridology – 5 Things Your Eyes Can Tell You about Your Health