This is a senile condition in which the eyelid (usually the lower lid) folds inward. It is very uncomfortable, as the eyelashes constantly rub against the cornea and irritate it. Entropion is usually caused by genetic factors and very rarely it may be congenital when an extra fold of skin grows with the lower eyelid (epiblepharon). Entropion can also create secondary pain of the eye (leading to self trauma, scarring of the eyelid, or nerve damage).
Also indexed as
Senile entropion of eyelidSenile entropion of lower eyelidSenile entropion of upper eyelid