Vertical diplopia requires detailed history, complete exam

Nashville-Vertical diplopia has an extensive differential diagnosis. However, it is im-portant to realize that if the ophthalmologist does an appropriate history and looks for a few key clues, there is rarely a case for which it is necessary to order imaging studies, according to Sean P. Donahue, MD, PhD, associate professor of ophthalmology, Vanderbilt University Medical Center, Nashville.