Ptosis is a condition in which the eyelid droops. It is caused by a weakness or separation of muscles deep within the eyelid. Ptosis does not involve excess skin or tissue in the eyelid (a condition called dermatochalasis). It is usually a result of aging, but some people develop ptosis after eye surgery or an injury, and some children are born with the condition.
A brief surgical procedure can eliminate the drooping. Many young patients with mild to moderate ptosis do not need surgery early in life. Patients who are also suffering from excess skin may choose to undergo blepharoplasty at the same time as ptosis repair.
Children with ptosis should be examined regularly to check for other vision problems including amblyopia ("lazy eye"), refractive errors and muscular diseases.