Cogan’s oculomotor apraxia /ko′gənz/ [David Glendenning Cogan, American ophthalmologist, 1908–1993] , an absence or defect of horizontal eye movements so that when the patient tries to look at an object off to one side, the head must turn to bring the eyes into line with the object, and the eyes exhibit nystagmus. The cause is probably a brain lesion. Also called Cogan’s syndrome.
