why is a normal eye not able to see clearly the objects placed closer than 25 cm?
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Answer:
A normal eye is unable to clearly see the objects placed closer than 25 cm because the ciliary muscles of eyes are unable to contract beyond a certain limit.
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1
Answer:
The maximum ‘accommodation’ of a normal eye is reached when the object is at a distance of about 25cm from the eye.
So, an object placed at a distance of less than 25cm cannot be seen clearly by a normal eye because all the power of accommodation has already been exhausted.
Also, the ciliary muscles can not make the eye lens more thick(convex).
The power of accommodation of the eye for a person having normal vision is about 4 diopters.
Hence, a normal eye is not able to see clearly the objects placed closer than 25cm.
Hope it helps you :)
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