What does visual efficiency refer to?

• A. How bright the light is.
• B. How well an individual uses remaining visual acuity at a distance or close up.
• C. Color discrimination accuracy.
• D. Depth perception.

Answer: (B)

Visual efficiency is about how effectively a person uses the vision they have left to perform tasks. It focuses on functional use of remaining visual acuity at various distances, not just how clear details appear on a standard eye chart. People can be visually efficient by employing strategies and tools—such as appropriate lighting, high-contrast materials, magnification, and behavior changes—that optimize their residual vision for everyday activities like reading, recognizing faces, or navigating environments. The other aspects aren’t about how well someone uses their remaining vision in real tasks: brightness relates to lighting, color discrimination is about color vision, and depth perception involves judging distances rather than how efficiently residual vision is used.