As the position of an object changes, the focal length of eye lens also gets adjusted by changing the curvature of the lens with the help of

ciliary muscles

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iris

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pupil

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retina

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Solution

The correct option is A
ciliary muscles

As the position of the object changes, the focal length of eye lens also gets adjusted by changing the curvature of the lens with the help of ciliary muscles. The ability of the eye to form an image on the retina by adjusting the focal length of the eye lens, by varying the curvature of the lens based on the position of the object is called the power of accommodation.

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Similar questions

The change in focal length of an eye lens is caused by the action of the

(a) pupil

(b) retina

(d) iris

(a) Draw a labelled diagram of the human eye. Label the following parts on this diagram: Cornea, Iris, Pupil, Ciliary muscles, Eye-lens, Retina, Optic nerve and Blind spot.

(b) What are the functions of the following parts of the eye?

(i) Iris (ii) Eye-lens (iii) Ciliary muscles (iv) Retina (v) Optic nerve

Ciliary muscles are responsible for changing the focal length of the eye lens according to the distance of the object.

Q. The ciliary muscles in an eye change the focal length of an eye lens to focus distant or nearby objects clearly, this ability of an eye is known as the power of an eye.

Contraction of the ciliary muscles ____ the focal length of the eye lens.

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