Which term indicates a patient experiencing fatigue from prolonged visual tasks?

The correct term for a patient experiencing fatigue from prolonged visual tasks is asthenopia. This condition, often referred to as eye strain, typically results from long periods of focus, especially on tasks such as reading, using computers, or other activities that require intense visual concentration. Symptoms of asthenopia can include fatigue, discomfort, headaches, blurred vision, and difficulty focusing, all of which stem from the overuse of the eye muscles.

The other terms listed refer to different ocular conditions. Anisocoria describes a condition where there is a difference in the size of the pupils, which is unrelated to fatigue from visual tasks. A cataract is an eye condition that leads to clouding of the lens, impairing vision, but is also not associated with fatigue from visual tasks. Aniridia is a rare congenital condition characterized by the absence of the iris, affecting vision but again is not linked to temporary visual fatigue. Understanding these distinctions helps in accurately identifying and addressing patient concerns in an optical setting.