What is the term for when vision is measured in only one eye?

The term for when vision is measured in only one eye is "monocular." This term specifically refers to the assessment of visual acuity, perception, or other visual functions using one eye at a time. In contrast, binocular vision pertains to the assessment involving both eyes working together, which is essential for depth perception and a wider field of view.

Understanding this distinction is crucial in optical practice, as certain conditions or visual impairments may only affect one eye, and recognizing this can help in diagnosing and prescribing appropriate corrective measures. Monocular vision testing is often used to evaluate patients who may have suffered an injury to one eye or have other ocular health issues affecting only one side.