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Side to side (horizontal nystagmus)
Up and down (vertical nystagmus)
Rotary
Depending on the cause, these movements may be in both eyes or in just one eye. The term "dancing eyes" has been used in regional dialect to describe nystagmus.
As presented in Table 2 the lesion of peripheral origin is likely to present with direction-fixed, dominantly horizontal nystagmus.
From 4 to 10% of Pingelapese people have a severe ocular abnormality manifested by horizontal nystagmus (recurrent flickering back-and-forth eye movements), photophobia, amaurosis (decreased vision), colorblindness, ...
Virus, Eosinophil Chemotactic Factors, Ethylmorphine, (5alpha,6beta)-Isomer, Follicle, Ovarian, Generalized Myotonia of Becker, Giant Osteoid Osteoma, Granulocytic Leukemias, Hemiatrophy, Facial, HIV rev-Responsive Element, Horizontal Nystagmus, ...
Vertical nystagmus occurs much less frequently than horizontal nystagmus and is often, but not necessarily, a sign of serious brain damage. Nystagmus can be a normal physiological response or a result of a pathologic problem.
Brain stem and cranial nerve deficits include sleep apnea, internuclear ophthalmoplegia (ipsilateral weakness of eye adduction plus contralateral horizontal nystagmus in the abducting eye with lateral gaze), ...
 See also: Nystagmus, Symptom, Urology, Neurology, Injury
  
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