Vestibular and non-vestibular nystagmus in examination of dizzy patients.

Observation of nystagmus is of great importance in the otoneurologic examination. By means of electronystagmography it is possible to examine the nystagmus under different visual conditions such as in darkness or with eyes closed. Physiological nystagmus is characterized by miniature eye movements with an amplitude of 4-5 minutes of one degree.