The science of iridology is based on the analysis of one of the most complicated tissue structures of the whole body – the iris. It is a method whereby observation of the iris can provide insight into the health of various organs and systems of the body via its markings and signs. These markings represent a picture of the integrity of the body, its constitutional strength, areas of congestion or toxic accumulations and inherent strengths and weaknesses. The use of iridology can be an insightful addition to naturopathic case taking, laboratory testing and physical examination and diagnostics.