What is the medical term for involuntary rapid movements of the eyes?

• A. Raccoon eyes
• B. Nystagmus
• C. Anisocoria
• D. Cerumen impaction

Answer: (B)

The correct term for involuntary rapid movements of the eyes is nystagmus. Nystagmus can occur in various forms, including horizontal, vertical, or rotary movements. These involuntary eye movements can be physiological, such as when they occur in response to specific stimuli, or pathological, which may indicate underlying neurological or vestibular issues. The presence of nystagmus is an important diagnostic indicator in medical examinations, often helping healthcare professionals assess conditions affecting the inner ear, brain, or visual pathways.

In contrast, raccoon eyes refer to periorbital ecchymosis or bruising around the eyes, typically indicative of trauma. Anisocoria describes a condition where the pupils are of unequal size, which can suggest various neurological conditions but does not involve eye movement. Cerumen impaction pertains to the buildup of earwax in the ear canal and is unrelated to eye movements. Understanding these distinctions highlights the specific nature of nystagmus in the context of eye movement disorders.