Ptosis is the medical term for drooping of the upper eyelid, a condition that may affect one or both eyes.

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• Ptosis may be Congenital or Acquired.
• When the edge of the upper eyelid falls, it may block the upper field of your vision.
• The normal position of the upper eyelid is midway between superior limbus and the upper pupillary margin.

Overview

Ptosis | Pseudoptosis (the Appearance of Ptosis) | Sponsors | Bottom of Page Ptosis may be classified by time of onset or by etiology. Congential Ptosis Acquired Ptosis Typical Jaw Wink Ptosis Neurogenic Horner's Syndrome Third nerve palsy Aponeurotic   Myogenic Myasthenia gravis Progressive external ophthalmoplegia Traumatic   Mechanical (pseudo-ptosis, or mass pushing down eyelid) Pseudoptosis may result from: Contralateral lid retraction (e.g. thyroid disease) Enophthalmos (following orbital fracture) microphthalmos Severe dermatochalasis