What term refers to the clarity of vision?

The term that refers to the clarity of vision is acuity. Visual acuity measures how well a person can see details and distinguish between various images and objects at a given distance. This is a critical concept in optometry as it helps determine the effectiveness of an individual's eyesight and can highlight any need for corrective lenses or other interventions.

Other terms listed refer to different aspects of vision and eye health. Asthenopia refers to eye strain or fatigue, which can result from prolonged use of the eyes, particularly during tasks requiring focus, such as reading or using screens. Aniridia is a rare congenital condition characterized by the absence of the iris in the eye, leading to various visual impairments. Anisocoria refers to a condition where the pupils are of unequal sizes, which can indicate underlying neurological or other health issues. Understanding these terms and their differences is important for identifying specific vision-related concerns.