Iridology is a system of alternative medicine that involves examining the iris, the colored part of the eye, for signs of health or illness. According to iridologists, different areas and patterns in the iris can indicate different things about a person’s health.
A black ring around the iris could potentially be interpreted as a sign of toxicity or congestion in the body according to some practitioners of iridology. However, it is important to note that there is no scientific evidence to support the validity of iridology as a diagnostic tool, and it should not be used as a substitute for proper medical diagnosis and treatment.