The word ptosis means downward displacement of an organ or tissue. Ptosis in ophthalmology usually refers to a drooping upper eyelid (also referred to as a “blepharoptosis”) but it can also refer to a drooping of the eyebrow (brow ptosis) or the midface (midface ptosis).

A ptosis may affect one or both eyelids and can be very asymmetrical depending on the cause of the ptosis. The most common cause of ptosis is a loosening of the tendon of the muscle that lifts the eyelid (the levator aponeurosis). This occurs most often in people over the age of 40 and the incidence increases with age. Ptosis can also affect children. 


A model showing the levator muscle leading to the levator aponeurosis (tendon) which is shown in stripes.


The treatment for ptosis involves surgery. It is important to see a specialist oculoplastic surgeon to determine the underlying cause before proceeding with ptosis surgery. 

For more information, visit the Ptosis Surgery page.

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