Epicanthus refers to a crescent-shaped fold of skin running vertically between the eyelids and overlying the inner canthus (Fig 17-8). There are 4 types:
epicanthus tarsalis: The fold is most prominent in the upper eyelid.
epicanthus inversus: The fold is most prominent in the lower eyelid.
epicanthus palpebralis: The fold is equally distributed between the upper and lower eyelids.
epicanthus supraciliaris: The fold arises from the eyebrow and terminates over the lacrimal sac.
Epicanthus inversus may be isolated or associated with blepharophimosis–ptosis–epicanthus inversus syndrome or ptosis. Surgical correction is only occasionally required.
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.