Palpebronasal fold

The palpebronasal fold (Medial canthic fold; Epicanthic fold, epicanthal fold, epicanthus, eye fold) is a skin fold of the upper eyelid, covering the inner corner (medial canthus) of the eye.

One of the primary facial features often closely associated with the epicanthic folds is the nasal bridge; all else equal, a lower-based nose bridge is more likely to cause epicanthic folds, and a higher-based nose bridge is less likely to do so.

There are various factors influencing whether someone has epicanthic folds, including geographical ancestry (Asia), age (many fetuses lose their epicanthic folds after 3 to 6 months of gestation), and certain medical conditions (Down Syndrome).