An epicanthic fold or epicanthus[6] is a skin fold of the upper eyelid that covers the inner corner (medial canthus) of the eye.[3] However, variation occurs in the nature of this feature and the possession of "partial epicanthic folds" or "slight epicanthic folds" is noted in the relevant literature.[7][8][9] Various factors influence whether epicanthic folds form, including ancestry, age, and certain medical conditions.
^Powell, M. L. (1981) Assessment and management of developmental changes and problems in children, Mosby, Incorporated, p. 38 ISBN9780801615207
^U. Schilbach, U. and Rott, H-D. (1988) Ocular Hypotelorism, Submucosal Cleft Palate, and Hypospadias: A New Autosomal Dominant Syndrome, American Journal of Medical Genetics 31, pp. 863–870