Cyclic Oculomotor Paralysis* *From the Neurosensory Center (Publication No. 9) and from the Departments of Ophthalmology and Neurology, College of Medicine, State University of Iowa. The Neurosensory Center is supported by Program Project Grant B3354 of the National Institute of Neurolgical Diseases and Blindness, Bethesda, Maryland. Presented at the 98th annual meeting of the American Ophthalmological Society, Hot Springs, Virginia, May, 1962.