Fig. 1. Nystagmus waveforms recorded by videonystagmography. (A) Pendular nystagmus showing sinusoidal oscillations. (B) Jerk nystagmus with slow phases that drift away from the fixation position with increasing velocity waveforms. Foveation period (red bars within the rectangle) which the eye velocity is at or near zero. LH, horizontal position of left eye; LV, vertical position of left eye.
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