American Board of Opticianry (ABO) Practice Test

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What is the term for when a patient's eyes move inward to focus at near?

When a patient's eyes move inward to focus at near
Unit of measurement for ophthalmic prism
Another name for a polariscope
Inflammation of the cornea

The correct answer is: When a patient's eyes move inward to focus at near

The correct answer is A, "When a patient's eyes move inward to focus at near." The term for when a patient's eyes move inward to focus at near is called "convergence." Convergence is the ability of the eyes to move medially (inward) when focusing on a near object. This is an important aspect of binocular vision and is necessary for clear and single near vision. In cases where there is a problem with convergence, such as convergence insufficiency, individuals may experience symptoms like eye strain, double vision, and difficulty reading. Therefore, understanding and assessing convergence is crucial in the field of opticianry. The other options are not relevant to the term for when a patient's eyes move inward to focus at near: B. "Unit of measurement for ophthalmic prism" refers to prism diopters, which is a measure of the power of prism correction. C. "Another name for a polariscope" is not a term related to focusing at near. A polariscope is an instrument used to detect stress patterns in ophthalmic lenses. D. "Inflammation of the cornea" is known as keratitis, which is a condition involving inflammation of the cornea but is not the term for when a patient's eyes move inward to focus at near.