Epicanthic fold , epicanthal fold, epicanthus, or simply eye fold are names for a skin fold of the upper eyelid, covering the inner corner (medial canthus) of the eye. Other names for this trait include plica palpebronasalis and palpebronasal fold. One of the primary facial features often closely associated with the epicanthic fold is the nasal bridge; all else equal, a lower-rooted nose bridge is more likely to cause epicanthic folds, and a higher-rooted nose bridge is less likely to do so. There are various factors that influence whether someone has epicanthic folds, including geographical ancestry, age, and certain medical conditions.