Ptosis: Causes, Presentation, and Management

Drooping of the upper eyelid (upper eyelid ptosis) may be minimal (1–2 mm), moderate (3–4 mm), or severe (>4 mm), covering the pupil entirely. Ptosis can affect one or both eyes. Ptosis can be present at birth (congenital) or develop later in life (acquired). Ptosis may be due to a myogenic, neurogenic, aponeurotic, mechanical or traumatic cause. Usually, ptosis occurs isolated, but may be associated with various other conditions, like...