Question

With the help of ciliary muscles the human eye can change its curvature and thus alter the focal length of its lens. state the changes that occur in the curvature and focal length of the eye lens while viewing (a) a distance object, (b) nearby objects.

Answer 1

the ability of the eye lens to adjust is called accommodation
the change in the curvature of the eye lens can thus change its focal length
when the muscles relax the lens become thin does its focal length increases this enable us to see the distance object clearly .
when you are looking at the object closer to the eye in the ciliary muscles contract this increases the curvature of the eye lens then becomes thicker consequently the focal length of the eye lens decreases .
this enables to see a near objects clearly.

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Answer 2

To see a distant object clearly , the focal length of the lens should be larger. For this, the ciliary muscles relax to decrease .

To see a distant object clearly , the focal length of the lens should be larger. For this, the ciliary muscles relax to decrease .

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Explanation:

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