Why is a normal eye not able to see clearly the objects placed closer

1.	Why is a normal eye not able to see clearly the objects placed closer than 25cm?
Answer» thnks honey for your answer? Because our convex len in eye is adjusted to see objects beyond 25 cm ok thanks for your answer?? Cuz the near point of eye is 25 cm. The lens cant be adjusted to see objects beyond 25 cm without strain

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