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The change in focal length of an eye tens is caused by the action of the (a) pupil. (b) retina. (c) ciliary muscles. (d) iris.

The change in focal length of an eye tens is caused by the action of the
           (a) pupil.                                 (b) retina.
           (c) ciliary muscles.           (d) iris.

Grade:12

2 Answers

Harshit Singh
askIITians Faculty 5963 Points
3 years ago
Dear Student

Option(c)is correct here.

Thanks
KAPADIA DEV
100 Points
3 years ago
The ciliary muscle is a circular muscle that relaxes or tightens the zonules to enable the lens to change shape for focusing. The zonules are fibers that hold the lens suspended in position and enable it to change shape during accommodation. It increases or decreases the focal length of the eye lens.

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