Meh. German naturopathic healing practitioners ("heilpraktiker") have been detecting diseases early for centuries. Its called "iris analysis". The idea being, t

Meh. German naturopathic healing practitioners ("heilpraktiker") have been detecting diseases early for centuries. Its called "iris analysis". The idea being, that the iris is divided into sections, each representing a part of the body and subtle but visible changes in a section suggest onset of disease in the connected area of the body. Acupuncture also recognizes such "microsystems" on the body.