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Why is a normal eye not able to see clearly the objects placed closer than 25 cm?
The normal eye is not able to see clearly the objects placed closer than 25 cm because all the power of accommodation of the eye has already been exhausted at a distance of 25 cm. The maximum accommodation of a normal eye is reached when the object is placed at a distance of about 25 cm from the eye. After this, the ciliary muscles cannot make the eye-lens more thick.
Explanation
A normal eye has the power of accommodation that enables objects as far as infinity and as close as 25cm to be focused on the retina. If a book is placed very close to the eyes, at a distance less than 25cm, then we feel a lot of strain on the eyes, and the printed matter of the book appears blurred.
Updated on: 10-Oct-2022
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