Question

Why normal eye not able to see clearly the object placed closer than 25cm
Answer in brief

Answer 1

This is because the ciliary muscles of eyes are unable to contract beyond a certain limit. If the object is placed at a distance less than 25cm from the eye, then the object appears blurred because light rays coming from the object meet beyond the retina.

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Answer 2

Because the near point of normal vision is 25cm So when the object is placed closer than 25cm it is not able to see objects clearly.