Certified Paraoptometric (CPO) Practice Exam 2025

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Prepare for the Certified Paraoptometric Exam with our comprehensive quiz featuring multiple-choice questions. Each question is accompanied by hints and explanations, helping you build your knowledge and confidence. Get ready to excel in your career!

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What is the result of light passing through a plus lens?

Diverged
Converged
Displaced
Scattered

The correct answer is: Converged

The result of light passing through a plus lens is convergence. A plus lens, or convex lens, is thicker in the center than at the edges. When parallel rays of light enter this type of lens, they are refracted inward towards the principal axis. This behavior causes the light rays to converge at a focal point beyond the lens. Plus lenses are typically used in vision correction for hyperopia (farsightedness) because they assist in directing light to the retina more effectively. This converging property is crucial in various optical applications where projection or magnifying effects are needed, such as in a magnifying glass or a projector. Other options, such as diverged, displaced, and scattered, do not accurately describe the behavior of light through a plus lens, highlighting the specificity of how these lenses focus light.