Certified Paraoptometric (CPO) Practice Exam 2025

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Which visual condition is described as a result of uncontrolled eye movements?

Keratoconus
Nystagmus
Pinguecula
Ptygerium

The correct answer is: Nystagmus

The condition characterized by uncontrolled eye movements is nystagmus. This condition involves involuntary oscillations of the eyes, which can occur in various patterns and can affect visual acuity and depth perception. Nystagmus may be congenital or acquired and can result from neurological disorders, certain medications, or inner ear problems. Keratoconus is a condition that affects the cornea, causing it to thin and change its shape, which can lead to visual distortion, but it does not involve uncontrolled movements of the eyes. Pinguecula is a benign growth on the conjunctiva of the eye, typically due to UV exposure, and while it may cause irritation, it does not affect eye movement. Pterygium is similar to pinguecula but can grow onto the cornea, potentially affecting vision, yet it also does not involve eye movements. Thus, nystagmus is specifically linked to the phenomenon of uncontrolled eye movements, making it the correct choice for this question.