nystagmus       
noun [ C or U ]  medical specialized uk/nɪˈstæɡ.məs/ us/nɪˈstæɡ.məs/
 眼球震颤
quick uncontrolled movements of the eyes
  Occasionally, rapid and abnormal eye movements termed as nystagmus may be seen. 有时候会见到被称为眼球震颤的快速异常的眼球运动。 
 A nystagmus can be caused by a number of factors that do not involve alcohol , for example tiredness. 多种与酒精无关的原因,如疲倦,都可能导致眼球震颤。 
 - More examples
- There was also nystagmus and a difficulty grasping objects by the right hand.
- She could no longer walk and nystagmus was present in all directions of gaze.
- Three patients had chin-up head postures caused by a nystagmus.