Which term describes involuntary rapid eye movements?

• A. Retinal detachment
• B. Nystagmus
• C. Cerumen impaction
• D. Otitis

Answer: (B)

Involuntary rapid eye movements are called nystagmus. This term describes rhythmic, repetitive eye motions that can be horizontal, vertical, or rotary, often with a slow drift in one direction followed by a quick corrective movement. Nystagmus can arise from issues affecting the vestibular system or the brain’s control of eye movements, and it may be present from birth or acquired later due to neurologic or inner-ear problems.

This sign points to a problem with eye movement control rather than the conditions listed in the other options. Retinal detachment causes visual symptoms like flashes, floaters, or a curtain-like loss of vision, not rapid eye movements. Cerumen impaction involves ear blockage leading to hearing loss or fullness, and otitis is an ear infection with pain and sometimes fever.