What is visual acuity?

Visual acuity refers specifically to the sharpness or clarity of vision, which is a critical aspect of how well an individual can see details at various distances. It is commonly measured using standardized tests such as the Snellen chart, where letters or symbols are displayed at specific distances to determine how well a person can see compared to a standard vision level.

This concept is fundamental in assessing eye health and determining whether a person may need corrective lenses or other interventions to enhance their ability to see clearly. In the context of vision, the focus is entirely on the ability to perceive visual information distinctly, making it essential to understand visual acuity in relation to overall eye health and functionality.

The other options may refer to different senses or functions that do not pertain directly to vision. For instance, options related to hearing or the function of the cornea do not accurately describe visual acuity itself, which is strictly about vision clarity.