Question

Which of the following adjustments are made by the eye to enable the clear vision of distant objects?

• A. Relaxation of ciliary muscles
• B. Thinning of the eye lens
• C. Increasing the focal length
• D. All of the above

Answer 1

Answer: (D)

All of the above

The curvature of the eye lens can be modified to change its focal length to some extent by the ciliary muscles. When the muscles are relaxed, the curvature decreases making the lens thin and the focal length increase. This enables us to see distant objects clearly.