The term natural medicine natural medicine, naturopathy, or naturopathic medicine is generally used to describe a therapy practice or preventive or curative intent, which has originated outside the modern development of medicine and pharmacology. Used for any complementary or alternative medicine remedies used by traditional or non-industrial. According to the World Health Organization (WHO) used the term refers to both traditional medicine systems as various forms of indigenous medicine. Natural medicine uses different diagnostic methods, such is the case, iridology, which allows to know the health status through the irises. This practice is academically recognized in some countries.