Sudden drooping of the patient’s eyelids may be caused by factors such as palsy of the motoneuron, orbital space-occupying lesions compressing the nerve, or ocular muscle weakness.
Central nervous system lesions, viral infections, etc. can lead to actinic nerve palsy. When the actinic nerve, which innervates the levator muscle, is paralyzed, it can cause the patient’s eyelid to droop, and eye movement disorders and other discomforts may also occur.
Occupying lesions in the orbit, such as tumors and hematomas, may compress the motoneuron and cause it to lose function, resulting in drooping of the eyelid, often accompanied by ocular motility disorders.
If the patient has ocular muscle weakness, it can also lead to eyelid ptosis, which is usually characterized by a pronounced morning lightness and evening heaviness.
It is recommended that patients with sudden eyelid ptosis seek medical attention to evaluate the condition and treat it as directed by a physician.