Nystagmus, Physiologic

**Definition:** Involuntary rhythmical movements of the eyes in the normal person. These can be naturally occurring as in end-position (end-point, end-stage, or deviational) nystagmus or induced by the optokinetic drum (NYSTAGMUS, OPTOKINETIC), caloric test, or a rotating chair.

**Tree numbers:** - G14.350.378

**Synonyms:** - Physiologic Nystagmus - Nystagmus, Physiological