Question

The change in focal length of an eye lens is caused by the action of the

(a) pupil

(b) retina

(c) ciliary muscles

(d) iris

Answer 1

Answer:

ciliary muscle

Explanation:

the change in focal length of an eye lens is caused by cilliary muscle

Answer 2

Answer:

the answer is ciliary muscles (c).

Explanation:

The adjustment of focal length of eye lens in human according to the position of the object is called power of accomodation. It is done by the help of ciliary muscles by contracting or relaxing it self.