1. From the Daroff-Dell’Osso Ocular Motility Laboratory, Louis Stokes Cleveland Veterans Affairs Medical Center, and the2The Neuro-Ophthalmology Laboratory, Institute of Clinical Neurology, University of Sassari, Sassari, Italy; and
2. From the Daroff-Dell’Osso Ocular Motility Laboratory, Louis Stokes Cleveland Veterans Affairs Medical Center, and the3Departments of Neurology and4Biomedical Engineering, Case Western Reserve University and University Hospitals of Cleveland, Cleveland, Oh
3. From the Daroff-Dell’Osso Ocular Motility Laboratory, Louis Stokes Cleveland Veterans Affairs Medical Center, and the3Departments of Neurology and
4. Akron Pediatric Ophthalmology, Akron, Ohio.