Certified Paraoptometric (CPO) Practice Exam 2026 – All-in-One Study Guide to Ensure Exam Success!

Question: 1 / 420

What lens type is defined as displacing light rather than focusing it?

Convex

Prism

The lens type that is defined as displacing light rather than focusing it is the prism. Prisms work by refracting light, causing it to change direction. This property allows prisms to be used in various optical applications, such as correcting certain vision problems and aiding in binocular vision.

Prisms do not converge or diverge light like convex or concave lenses; rather, they manipulate the path of light to achieve desired visual effects. This is essential for applications where the direction of light is more critical than its convergence or divergence. The appropriate use of prisms can enhance visual acuity in certain conditions and is an important aspect of optical practices.

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