Fig. 13. Congenital hypoplasia of the 3rd nerve in a 40-year-old female.
A. Axial high-resolution T2 image shows the hypoplastic right 3rd nerve (arrows) compared with the normal left 3rd nerve (arrows). B. Orbital coronal T2 image shows atrophy of the right medial and inferior recti (arrows). C. Gaze photographs show impaired adduction and infraduction of the right eye. X = interruption of eye movement