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Q.

Is it true that the normal eye is not able to see objects clearly placed closer than 25 cm?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
There is a minimum amount below which the eye lens' focal length cannot be reduced. Over the near point (25 cm), the eye cannot focus on the retina for things that are too close. There is a minimum amount below which the eye lens' focus length cannot be reduced. A typical eye can see objects at various distances clearly because the ciliary muscles may alter the focal length of the eye lens. We can't see items closer than 25 cm away because the ciliary muscles can no longer contract after a certain distance.
  
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