Fig. 3. Electro-oculographic recording of normal optokinetic nystagmus demonstrating rapid recovery phase. Upper tracing: eye position; lower tracing: peak velocity. (Metz HS, Scott AB, O'Meara D: Saccadic velocity in infants and children. Am J Ophthalmol 72:1130, 1971. Published with permission from the American Journal of Ophthalmology. Copyright by the Ophthalmic Publishing Company)