Iridology (also iris analysis, iris diagnosis or eye diagnosis) is an alternative medical diagnostic method that assumes that human diseases can be determined by analyzing the tissue structures of the iris. It could neither be empirically proven nor theoretically justified.
From the point of view of its users, iridology can rarely be used as the sole diagnostic tool and is therefore usually supplemented by other methods. It should serve in particular to determine a basic disposition, which could indicate possible weaknesses in the organism.
Iris diagnostics should not be confused with iris recognition, which is used to identify people, similar to the fingerprint, and uses the fact that the structure of the iris is different in each person.