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

(c) ciliary muscles

 

Explanation

The ciliary muscles helps in changing the shape of the lens, thus changing its focal length.

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CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo