From ArticleWorld

Iridology is a controversial form of alternative medical diagnostics that involves an iridologist, a specialist in the field, assessing an individual’s health by looking into their eyes. Specifically, iridologists study the part of the eye known as the iris. The iris is the colored part of the eye that contains the pupil in its center. The iris is made up of multiple colors and different striations or linear patterns. Practitioners of iridology believe that, by carefully studying the patterns and lines within the iris, they can identify and differentiate between areas of the body that are healthy and those that are inflamed or unwell.

Iridologists use strong lights and magnifiers to visualize the iris carefully. Sometimes a slit-lamp, a special eye microscope, is used to view the eye at a very high magnification and at close range. The examination itself is painless.

After the eye is examined, the findings are matched to an eye chart that divides the iris into 80-90 separate zones. Each zone represents a separate area of the body. Iridologists believe they are able to identify past and present medical conditions and to predict areas where future problems in the body might occur.

Iridology is not a new practice; it dates back to similar practices used in Ancient Greece. In the present day, iridology is used solely a diagnostic tool in identifying body areas that may be unwell, although many iridologists specialize in other, more therapeutic, areas of alternative medicine. To date, conventional medical science does not view the practice of iridology as a valid medical tool.