Certified Paraoptometric (CPO) Practice Exam 2026 - Free Paraoptometric Practice Questions and Study Guide

The correct answer is the ability of the eyes to focus on objects both near and far is known as accommodation. Accommodation refers to the process by which the eye adjusts its lens shape to maintain a clear image of objects at various distances. This ability is crucial for tasks such as reading a book and then looking up to see something in the distance without needing to change glasses or use corrective lenses.

While the other terms relate to vision, they describe different concepts. Vision adaptation involves how the eyes adjust to varying light conditions, refraction refers to the bending of light as it passes through different mediums and is critical for focusing images on the retina, and presbyopia is an age-related condition where the eye loses its ability to focus on close objects due to decreased elasticity of the lens, often requiring reading glasses. Thus, accommodation specifically addresses the ability to focus on both near and far objects, making it the most accurate choice.