Eye movement record showing horizontal and vertical traces of the right (R) and left (L) eyes with the Ober-2 system. Eye movement record showing horizontal.

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Presentation transcript:

Eye movement record showing horizontal and vertical traces of the right (R) and left (L) eyes with the Ober-2 system. Eye movement record showing horizontal and vertical traces of the right (R) and left (L) eyes with the Ober-2 system. Patient no 2 with only horizontal traces shown. The record showing a jerk nystagmus with a SPI (slow phase exponentially increasing velocity) waveform with a superimposed foveating saccade (arrow). Horizontal bar, 2 degrees; vertical bar, 200 ms. Lena Jacobson et al. Br J Ophthalmol 1998;82:1026-1032 ©1998 by BMJ Publishing Group Ltd.