Sanpaku

thumb|200px|John F. Kennedy, one of the twelve famous people [[George Ohsawa claimed were suffering from sanpaku because of visible sclerae under their irises.]]

or is a Japanese term referring to a person with visible sclera on three sides of their irises: the normal left and right, plus above or below. The term is most often used in English to refer to a folk belief whereby it functions as an omen or symptom in alternative medicine. It was introduced into English in the mid-1960s by George Ohsawa as a condition supposedly cured by his macrobiotic method.