Síndrome de Marcus Gunn. Presentación de un caso

marcus gunn phenomenon is a congenital movement associated with the trigeminus-oculomotor nerve which affects the levator palpebrae superioris and the mastication muscles. ptosis associated with synkinesis is presented and it consists of the involuntary synchronic (ptosis) eyelid elevation, related to the movements of lateral displacement of the jaw or when opening the mouth, which is frequently found in girls in left eye; occasionally rectus superioris paralysis of left side is also observed. it is rarely associated with systemic anomalies. some authors consider that this phenomenon is less evident as the years pass. the ophthalmologic and clinical features of a patient that was diagnosed with this syndrome in association with systemic anomalies is presented. the early diagnosis of this pathology makes the prevention of amblyopia and its sequela possible.