[Evaluation of levator palpebrae superioris muscle resection in 500 cases].

We sum up the effects of levator palpebrae superioris muscle resection to correct congenital ptosis in 500 cases. The surgical results in 369 cases (73.8%) are excellent; ninety-six cases (19.2%) are good and 35 cases (7%) are poor. The operative result depends on the amount of muscle resection. We believe that the levator palpebrae superioris muscle resection is the first choice of treatment for a patient whose levator has no function. The operation method is described and the indications of the operation and related problems are discussed.