nystagmus

/ni-stag-muhs/US // nɪˈstæg məs //UK // (nɪˈstæɡməs) //

眼球震颤,眼球震荡,眼球颤动,眼震

Definitions

n.名词 noun

1
- : a congenital or acquired persistent, rapid, involuntary, and oscillatory movement of the eyeball, usually from side to side.

Nystagmus occasionally occurs in monocular fixation (with exclusion of the other eye).
Not to complicate the question, however, I have excluded all cases of nystagmus from the following investigation.
(a) If the ear be normal, there is no spontaneous nystagmus.
Slight horizontal nystagmus in both eyes on extreme outward rotation of the eyeballs.
Syringing with hot water causes a nystagmus directed towards the ear syringed; syringing with cold water, away from the ear.