Purpose: To compare a variety of materials that were used in frontalis suspension surgery for correction of severe congenital ptosis. Treating severe congenital ptosis can be challenging and a proper preoperative evaluation may help prevent unexpected outcomes. Patients and method:This study included 60 patients suffering from severe congenital ptosis, patients will be randomizelly allocated in two equal interventional groups: First group (38 eye included) underwent FS ptosis surgery using Fascia lata and the second group (70 eye included) underwent FS ptosis surgery using synthetic material Results: at the end of the follow-up period (6 months postoperatively), most of the patients in both groups (89.5% of group A, 75.7% of group B) achieved good to excellent cosmetic results. Conclusion:considering the use of the Facia lata sling material and Synthetic material, Using Crawford technique were both safe and effective with comparable results in the correction of severe ptosis with poor levator Function.