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Eyelid droop, known medically as ptosis, is a condition in which the upper eyelid droops lower than normal. It can partially or completely cover the pupil, obstructing vision. Ptosis occurs when the muscles that lift the eyelid (levator palpebrae superioris and superior tarsal muscle) or the nerves controlling them are weak or damaged. It can be congenital or acquired through aging, injury, nerve palsy or diseases like myasthenia gravis.
read more about eyelid droop ...Congenital ptosis results from developmental problems in the levator muscle. Acquired causes include stretching or detachment of the levator aponeurosis due to aging or long-term contact lens wear, trauma, or surgery. Tumors or masses can weigh down the lid, and third cranial nerve palsy or neuromuscular conditions like myasthenia gravis can impair eyelid elevation. Sometimes ptosis is a symptom of nerve disease or stroke.
Symptoms include a droopy upper eyelid affecting one or both eyes, blocked or blurred vision, and a tired or sleepy appearance. Patients may tilt their head back or raise their eyebrows to see better. In children, ptosis can lead to lazy eye (amblyopia). Associated nerve damage may cause double vision or pupil abnormalities.
Eye doctors diagnose ptosis by taking a medical history and measuring eyelid position. They may order imaging such as CT or MRI to look for nerve or muscle disorders, tumors or other causes. Tests for myasthenia gravis or other systemic diseases may be needed to determine the underlying cause.
Treatment depends on the cause and severity. Mild ptosis may not require treatment. Surgery can tighten or shorten the levator muscle or attach the eyelid to the forehead muscles (frontalis sling) to lift it. In some cases, glasses with a crutch can support the eyelid. Treating underlying conditions such as myasthenia gravis or nerve palsy is essential. Early treatment in children prevents amblyopia.
Ptosis can affect appearance and sometimes obstruct vision. In adults it may be primarily cosmetic, but in children it can lead to vision problems if not treated. Evaluation by a specialist is important.
Congenital ptosis does not resolve without treatment. Acquired ptosis may improve if it's caused by a temporary condition like nerve palsy or myasthenia gravis, but persistent drooping usually requires surgery.
Surgery typically involves tightening the levator muscle or attaching the eyelid to the forehead muscle with a sling. The procedure is usually outpatient and uses local or general anesthesia depending on age and condition.
Many cases can't be prevented because they are congenital or related to aging. Protecting your eyes from injury and treating conditions like nerve palsy or myasthenia gravis promptly may reduce risk of acquired ptosis.