AIM:To investigate the superiority and disadvantage of three operations for severe congenital blepharoptosis.METHODS:Forty-two severe congenital ptosis cases 47 eyes undergoing therapy were divided into three groups.25 cases 28 eyes were treated by shortening levator muscle of upper eyelid,10 cases 12 eyes by frontalis muscle flap suspension operation,and 7 cases 7 eyes by frontal muscle suspension using fascia lata.The clinical data were recorded and analyzed,and the effect was evaluated.RESULTS:The cases which were conducted shortening levator muscle of upper eyelid had natural appearance and satisfactory results.And the others had obvious dermatolysis of upper eyelid,blepharal dysraphism and insufficient correction.CONCLUSION:Shortening levator muscle of upper eyelid is more suitable for physiology status and has the best effects and fewer complications.