a rapid, involuntary oscillation (usually back and forth) of the eyes that causes impaired vision It is often seen in children born with poor vision From: http: //www nystagmus org/
Involuntary horizontal, vertical, or rotary movement of the eyeballs See also vision after head injury
Continual, regular, uncontrollable movement of the eyes affecting detail vision The condition may vary and is often worse when a person is under stress or is tired; as a result vision may vary Click here for more information
Uncontrolled, involuntary rhythmic rapid eye movements which may be congenital or acquired Usually in response to movement of the head