FIG 9.

Oblique axial T2-weighted MRI of the midbrain of the child in Fig. 8 with partial congenital right oculomotor palsy. Note apparent absence of the right oculomotor nerve, and marked hypoplasia of the left oculomotor nerve. Thus, the anatomic findings of bilateral oculomotor hypoplasia were more severe than the clinical findings of partial right unilateral oculomotor palsy. The images are 1-mm thick.