Sclerology DefinitionSclerology: Sclerology, reading of the "whites" of the eyes, is a system of health. It differs from Iridology, which looks at the iris. Sclerology has been used perennially by indigenous cultures for at least a millennia. Ancient Chinese medical texts show that the method was used in China over 1000 years ago. American Indians (Nez Percˇ and Blackfoot) practiced it but kept no written records.