ObjectiveTo explore the efficacy of modified levator palpebrae superioris muscle recession under microscope on severe congenital ptosis. Methods15cases(19eyes) of severe congenital ptosis were treated with modified levator palpebrae superioris muscle recession under microscope technique. Postoperative local reaction and correction effect were observed. Results1 eye was undercorrected requiring reoperation, 3 eyes were overcorrected, the position returned to normal after symptomatic treatment massage. Patients were followed up for 6 months-or 1 year, the postoperative lid fissure on straight gaze in 19 eyes were over (6-8 mm) and the position of the superior eyelid margin were over pupil area. All the eyes were the natural curvature of the eyelid, eyelashes were in normal position, there were no exposure keratitis and other complications. ConclusionModified levator palpebrae superioris muscle recession under microscope treating severe congenital ptosis were satisfactory.

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