Question

When objects at different distances are seen by the eye which of the following remain constant?

• A. Focal length of eye-lens
• B. Object distance from eye-lens
• C. The radii of curvature of eye-lens
• D. Image distance from eye-lens

Answer 1

The correct option is D Image distance from eye-lens

Objects at different distances are seen by the eye by focusing them on the retina of the eye by changing the focal length of the eye lens.

But the image is always formed at the retina and hence image distance from the eye lens remains constant.