The focal place of the eye can only see how many degrees?

The focal place of the eye can only see how many degrees?

• A. 1-3
• B. 5-10
• C. 15-20
• D. 30-40

Answer: (A)

Central, high-acuity vision comes from the fovea, a tiny region at the center of the retina. It can resolve fine detail only in a very small portion of the visual field—roughly about one to a few degrees. In practice, sharp detail is confined to about 1–3 degrees of visual angle, which is why we move our eyes to bring objects of interest into that small central window. Beyond that narrow zone, vision is less sharp and relies on peripheral sight. So the best match is 1–3 degrees. The larger ranges would imply a wider high-detail area that the eye’s central vision doesn’t provide.

Central, high-acuity vision comes from the fovea, a tiny region at the center of the retina. It can resolve fine detail only in a very small portion of the visual field—roughly about one to a few degrees. In practice, sharp detail is confined to about 1–3 degrees of visual angle, which is why we move our eyes to bring objects of interest into that small central window. Beyond that narrow zone, vision is less sharp and relies on peripheral sight. So the best match is 1–3 degrees. The larger ranges would imply a wider high-detail area that the eye’s central vision doesn’t provide.