Question

The change in the focal length of an eye lens is caused by the action of the :A) pupil B) Iris C) ciliary muscles D) Retina ​

Answer 1

The change in the focal length of an eye lens is caused by the action of the option (C) Ciliary muscle.

Explanation:

1. The ciliary muscle is an intrinsic muscle of the eye.
2. ciliary muscle help in control of accommodation for viewing objects at various distances.