Ectropion

Alternative names:

outward turning of the lower eyelid

Definition:

The turning out of the eyelid (usually the lower eyelid) so that the inner surface is exposed.

Causes, incidence, and risk factors:

Ectropion is usually caused by the aging process and the weakening of the eyelid muscles causing the lid to turn out. It can also be caused by contraction of scar tissue from burns or from facial palsy, or as a congenital defect. Ectropion interferes with normal tearing and may result in chronic conjunctivitis. Constant wiping of the eye may lead to further drooping of the eyelid. Ectropion can be seen in children with Down's syndrome due to a congenital malformation of the lateral canthal ligament.