Quick answer: In adults, the most common cause of ptosis is age-related > stretching or weakening of the levator aponeurosis, the tissue that connects > the eyelid-lifting muscle to the eyelid. Other causes include contact-lens wear, trauma, previous eye surgery, eyelid swelling or masses, neurological disorders and muscle conditions. Sudden ptosis accompanied by double vision, headache, abnormal eye movements or unequal pupils requires urgent medical assessment.  When the upper eyelid drops low enough to cover part of the pupil, the condition is classified as ptosis, and the cause determines everything about how it should be treated. The levator palpebrae superioris muscle performs most of the eyelid elevation, while Müller’s muscle provides additional lift. Disruption to either muscle, its nerve supply, or the connective tissue attachments results in a drooping lid. Identifying the specific cause determines both the treatment approach and expected outcomes. Cause Typical pattern Other clues Aponeurotic ptosis Gradual, often age-related High crease, good […]