Euryblepharon is a condition associated with excess horizontal eyelid length and decreased vertical eyelid skin. As a result, the eyelids can be pulled away from the eyeball and give an appearance of ectropion. It is most apparent in the lower eyelids, however, all four eyelids can be involved. It is often, but not necessarily, symmetric. Etiology of congenital euryblepharon is not known. It may be associated with other eyelid anomalies, including ptosis and telecanthus. Associated findings of nystagmus and esotropia have been reported. It may be inherited with an autosomal dominant variety having been reported.
Treatment of euryblepharon consists of reformation of the lateral canthal angle, removing of excess horizontal eyelid tissue, and replacing the deficient eyelid skin with either skin grafts or flaps. Timing of the surgery will depend on the status of the cornea as described in the eyelid coloboma portion of this chapter.