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Q.

What will happen to the lens and the ciliary muscle when we look at nearby objects?


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a

Ciliary muscle : contract and Lens : focal length decrease

b

Ciliary muscle : contract and Lens : focal length increase

c

Ciliary muscle : contract and Lens : focal length remains same

d

None of these 

answer is A.

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Detailed Solution

Ciliary muscles contract and focal length of the nearby objects decreases when we look at nearby objects.
When we look at the nearby objects, ciliary muscles are under pressure, so they contract, and the lens becomes thick. The curvature of the lens increases. Hence, the focal length of the eye lens decreases.
 
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What will happen to the lens and the ciliary muscle when we look at nearby objects?