Which term refers to the constant involuntary movement of the eyes?

Which term refers to the constant involuntary movement of the eyes?

• A. Ataxia
• B. Nystagmus
• C. Drowsiness
• D. Red eyes

Answer: (B)

Involuntary, rhythmic eye movements are called nystagmus. This term names the repeated, unconstrained motion of the eyes, which can be horizontal, vertical, or rotational. It can occur in normal situations (like watching a moving scene or after spinning) or indicate a vestibular or neurological issue when persistent. The other terms don’t describe this eye movement: ataxia is about lack of coordination of voluntary movements; drowsiness is a state of sleepiness or reduced alertness; red eyes describe appearance due to irritation or infection, not eye movement.

Involuntary, rhythmic eye movements are called nystagmus. This term names the repeated, unconstrained motion of the eyes, which can be horizontal, vertical, or rotational. It can occur in normal situations (like watching a moving scene or after spinning) or indicate a vestibular or neurological issue when persistent. The other terms don’t describe this eye movement: ataxia is about lack of coordination of voluntary movements; drowsiness is a state of sleepiness or reduced alertness; red eyes describe appearance due to irritation or infection, not eye movement.