nystagmograph

nystagmograph [nĭ-stăg′mə-grăf′] n.

1. An apparatus for measuring the amplitude and velocity of ocular movements in nystagmus by measuring the change in the resting potential of the eye as the eye moves.

Related formsnys′tag•mog′ra•phy (nĭs′tăg-mŏg′rə-fē) n.