How is visual acuity defined?

Visual acuity is defined as the ability to perceive and assimilate visual information, which encompasses the clarity and sharpness of vision. It refers to how well an individual can see details and distinguish between different patterns, shapes, and forms in their visual environment. This capability is crucial in various contexts, such as reading, recognizing faces, and performing tasks that require fine visual discrimination.

While maintaining focus is important for visual tasks, it is not a direct definition of visual acuity, which more specifically relates to the resolution of visual stimuli. Distinguishing colors pertains to color vision, which is a separate function that may accompany visual acuity but does not define it. Reading small text involves high visual acuity but is not a comprehensive definition, as acuity itself encompasses much broader aspects of vision beyond just text readability.