Upper Eyelid Dynamics in Pediatric Blepharoptosis Using High Speed Videography

Inclusion Criteria: * Patients who are diagnosed as simple congenital ptosis with fair to good levator function (≥5 mm lid elevation) with age range from 5 to 18 years old. Exclusion Criteria: * Patients with a history of previous eyelid surgery or trauma * Blepharophamosis and Marcus Gun Jaw-winking syndrome * Patients with associated neurological disorders * Patients with craniofacial abnormalities * Patients with suspected myasthenia or myopathies * Patients with absent Bell's phenomenon * Patients with dry eye * Uncooperative patients