Entropion is a medical condition in which the eyelid folds inward. It usually occurs in the lower eyelid, but it can affect either. The reverse is a condition called ectropion, in which the eyelid ...

Adults with facial nerve paresis (FNP) generally develop ectropion, but a recent report of children with syndromatic FNPs implies that entropion may be more common in this setting than ectropion.

Acquired entropion in children may happen as a result of ocular scarring following trauma, infection or surgery. Upper lid entropion in children is rare; Botulinum toxin injection has been ...

Chris Lewis explains that the condition, entropion, is relatively common. It is thought to be mainly hereditary and is seen in pedigree and crossbred flocks, although other factors may have an effect.