The focal length of the eye lens increases when eye muscles

Options

A. are relaxed and lens becomes thinner
B. contract and lens become thicker
C. are relaxed and lens becomes thicker
D. contract and lens become thinner

Answer

A

Explanation

The contraction and relaxation of ciliary muscles helps to alter the curvature of the lens. The ability of the eye to change the focus between objects at different distances by altering the curvature of the lens is called power of accommodation