Certified Ophthalmic Medical Technologist (COMT) Practice Exam

What characterizes the eye movements seen in opsoclonus?

1. Rapid, rhythmic oscillations

2. Random, constant, chaotic movements

3. Slow, deliberate tracking

4. Directional jerks

The correct answer is: Random, constant, chaotic movements

Opsoclonus is characterized by random, constant, chaotic movements of the eyes, which is distinctive and different from other types of eye movements. This phenomenon often manifests as a series of abrupt and uncontrolled saccades, leading to a lack of a clear pattern or rhythm, setting it apart from other ocular movements. Unlike slow, deliberate tracking which would reflect a coordinated effort to follow a target, the chaotic movements in opsoclonus are not purposeful and can occur in any direction without a predictable rhythm. It is important to note that while rhythmic oscillations are seen in conditions like nystagmus, opsoclonus lacks that rhythmic characteristic. Additionally, directional jerks would imply a more organized movement pattern, which does not accurately represent the erratic nature of opsoclonus. Therefore, recognizing the chaotic and uncoordinated nature of the eye movements in opsoclonus is crucial in identifying this condition.