Foundation
Physics Foundation
Human Eye And Colorful World
Question

Cilliary muscles in the eye :

A Holds the eye lens in place

B Increases or decreases the focal length of the eye lens.

Both A and B
None of these
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Solution

The eye lens is composed of fibrous, jelly-like material. Its curvature can be modified to some extent by the ciliary muscles. The change in the curvature of the eye lens can thus change its focal length. Thus the ciliary muscles in the eye increase or decrease the focal length of the eye lens.