Alternating ptoi after bilateral frontali mucle upenion for congenital ptoi

PURPOE: To report an unuual repone to bilateral frontali upenion urgery for congenital ptoi. METHOD: Cae report. REULT: A 6-year-old child with infantile eotropia and bilateral congenital ptoi received a homologou facia lata frontali upenion. After urgery, the patient exhibited an alternating ptoi, caued by alternating unilateral frontali mucle contraction, which ha perited throughout 3 year of potoperative obervation. CONCLUION: ymmetric frontali mucle activation may not alway occur after bilateral frontali mucle upenion urgery for congenital ptoi. Amblyopia, trabimu, or fixation preference may predipoe patient to ue unilateral brow elevation, depite bilateral frontali mucle upenion urgery