(WAA) Neuro-ophthalmology Fellow, Department of Ophthalmology; (VB) Cyrus H. Stoner Professor of Ophthalmology, Professor of Ophthalmology and Neurology, Departments of Ophthalmology and Neurology, Emory University School of Medicine, Atlanta, Georgia
A 67-year-old man with a known history of heart failure and atrial fibrillation developed binocular horizontal diplopia in right gaze after cardiac catheterization. His examination showed normal afferent visual function, full ocular movement of the right eye, and slow adducting saccades in the left eye only which explain his intermittent diplopia in right gaze. He had normal vertical eye movements in addition to normal lid and pupillary examinations. Figure 1a/b : Axial MRI showing diffusion weighted imaging (DWI) hyperintensity in the left posterior pons (A) with corresponding apparent diffusion coefficient (ADC) hypointensity (B), confirming an acute ischemic stroke (lacunar infarction) Figure 2: Illustration showing the anatomy of the RIGHT medial longitudinal fasciculus (MLF).