Why is a normal eye not able to see clearly the objects placed clo | Filo

Class 10

Science

Physics

States of Matter

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150

Why is a normal eye not able to see clearly the objects placed closer than 25 cm?

Solution:

Ciliary muscles contract and expand to change the focal length of eye lens so that it is able to see objects at variable distances. However, too much contraction lays a lot of stress on the eye muscles and when objects are closer than the near point(25 cm), the eye is unable to focus its image on retina. Hence, a normal eye cannot see objects closer than 25 cm clearly.

585
150

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