Congenital Paradoxical Lower Eyelid Retraction With Upgaze due to an Anomalous Extraocular Muscle.

Congenital anomalous orbital structures are rare and associated with strabismus, globe retraction, and dystopia. The authors present a case of congenital paradoxical right lower eyelid retraction with upgaze due to an anomalous extraocular muscle in a 17-year-old, healthy, female patient. Orbital computed tomography showed an intraconal, inferolateral soft-tissue band extending from the orbital apex to the inferior oblique muscle and lower eyelid.