Fig. 7. Electro-oculography of patient with superior oblique palsy. Both upward (U) and downward (D) saccades in adduction normally are rapid. Upper tracing: eye position; lower tracing: peak velocity. (Metz HS: Saccadic velocity studies in superior oblique palsy. Arch Ophthalmol 102:721, 1984. Copyright 1984, American Medical Association)