Ptosis can be divided into congenital and acquired two. They both can be unilateral or bilateral, that is, there is only one upper eyelid drooping eyelid is drooping situation or two. Congenital ptosis, usually caused by congenital weakness of the levator muscle, weakness, poor growth can be caused by congenital oculomotor nerve. The latter is often also have superior rectus muscle hypoplasia situation. Acquired ptosis may be due to neurological disorders, external injury, compression fracture, scar contracture, edema, hematoma or tumor caused.
Ptosis in degree is divided into mild, moderate and severe of three. Mild and moderate ptosis, the levator muscle that there is a certain function; However, if the side is shown as a big eye and one eye small, is very beautiful. Severe ptosis, said the total loss of levator function, the patient can hardly open eyes, not only looks ugly, is still seriously affect the learning, work and health words.
For groups: congenital eyelid ptosis sometimes associated with small eye fissure, epicanthus and other eye abnormalities in patients.
Surgical procedure: l, levator muscle shortening 2, 3 frontalis muscle suspension method, the amount of muscle flap
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