Imaging advances in neuro-ophthalmology.

Magnetic resonance imaging has provided many advances in the field of neuro-ophthalmology. Refinements in magnetic resonance imaging allow excellent evaluation of the brainstem, cranial nerves, and sellar and suprasellar regions. Gadopentetic acid enhancement allows identification of subtle lesions, which may not otherwise alter morphology, as this agent may cross an abnormal blood-brain barrier. This year I have focused on imaging advances in evaluation of optic gliomas, radionecrosis of the optic nerves and chiasm, internuclear ophthalmoplegia, and facial pain and hemifacial spasm.