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Q.

Is it true that Ciliary muscles can alter the thickness and curvature of the lens?


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a

True           

b

False          

answer is A.

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Detailed Solution

The above statement is true.
The muscles of the ciliary body of the eye suspend the lens located between the sclera and the fine ligaments. They are made up of both longitudinal and circular fibres, which change the shape of the lens, enabling the eye to focus on near or far objects. Ciliary muscles can change the thickness and curvature of the lens. This change in curvature of the eye lens may thus alter its focal length.
 
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