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Q.

The ciliary muscles of a normal eye are in there as:


(A) Most relaxed


(B) Most contracted state


In which of the two cases does the focal length of the eye lens become more?


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a

A

b

B

c

Both of the above

d

None of the above 

answer is A.

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Detailed Solution

The ciliary muscles of a normal eye are most relaxed when looking at a distant object. The eye lens becomes thin to increase the focal length of the eye lens.
The ciliary muscles of a normal eye are most contracted when the eye is looking at a nearby object. The eye lens becomes thick. This characteristic of adjusting the focal length of the eye lens is called the power of accommodation.
 
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The ciliary muscles of a normal eye are in there as:(A) Most relaxed (B) Most contracted stateIn which of the two cases does the focal length of the eye lens become more?