Entropion is an inversion of the eyelid margin. Lower eyelid entropion (usually involutional) is much more common than upper eyelid entropion (usually cicatricial). Entropion may be unilateral or bilateral and is often classified as follows:
Congenital entropion is discussed in Chapter 10.
Excerpted from BCSC 2020-2021 series: Section 10 - Glaucoma. For more information and to purchase the entire series, please visit https://www.aao.org/bcsc.