Biological terrain evaluation technique through detailed observation of the eye's iris, whose signs (spots, fibers, rings) are believed to reflect the organism's constitutional state and predispositions.
Classification system of individual biological constitution in naturopathy, integrating morphotype, temperament and diathesis to fully personalize the health strategy.
Study of correspondences between facial morphology and psychological traits, used in naturopathy to refine temperament understanding and adapt therapeutic support.