Iridology is the idea that areas of the body are represented in a particular part of the iris. In the study of iridology, each section of the iris in both left and right eyes is divided up almost like a pie into different parts of the body, and from that iridologists can then determine which part of the body is diseased or not functioning properly. Examination of the eye, including the iris, by a trained physician can at times be an indication of diseases that affect the eye, for example diabetes. However, there is no evidence that each part of the iris represents different organs and other parts of the body. Iridology charts, which can vary greatly depending on the chart, are referred to by iridologists to determine which organ is diseased. Though in double blind placebo-controlled studies, a trained iridologist has been able to correctly diagnose the disease. In these studies, iridologists examined the actual iris of both diseased and healthy patients, and recorded their diagnosis. In all of these clinical studies using correct scientific procedure, the iridologist could not produce a correlation between specific patterns of the iris and the presence or absence of disease, besides chance. Therefore the examination of the iris is of no clinical use in diagnosing disease in other parts of the body not relating directly to the eye itself. There has never been a proven correlation between the presence of patterns on the iris and disease in other parts of the body. So I think it would be wise for everyone to stick to their normal diagnostic processes.