end-positional nystagmus

end-positional nystagmus

a horizontal rhythmic oscillation of the eyes on extreme lateral gaze. It occurs in normal eyes when the fixation point is outside the binocular field. Also called deviational nystagmus, pseudonystagmus.

end-po·si·tion·al nys·tag·mus

(end'pŏ-zish'ŭn-ăl nis-tag'mŭs)
A jerky physiologic form of the disorder that occurs in an otherwise normal patient, when attempts are made to focus on a visual point at the limits of the field of vision.