Ptosis
Definition: Ptosis is a drooping of the eyelid. Usually this term describes the upper lid drooping down, but occasionally it is used for a lower lid that rides up too high. If the condition becomes severe, blocks vision or becomes unappealing, laser and surgical treatment may be pursued.
Cause: Ptosis is usually caused by age-related laxity of the lid tissues. However, other causes, such as trauma, paralysis of the lid nerves from a neurological disorder and/or lid manipulation, such as contact lens wear, can cause the eyelid to droop. Rarely, ptosis can be congenital, occurring due to a developmental abnormality.
Symptoms: In ptosis, the eyelid droops. The drooping may be mild, causing only cosmetic deformity, or may be so severe that the lid covers the eye, causing decreased vision.
Treatment: Ptosis can be repaired with a minor surgical procedure.
Prognosis: Depending on the underlying cause, ptosis may improve or worsen with time. Surgery can improve this condition if it worsens.
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