The change in focal length of an eye lens to focus the image of objects at varying distances is done by the action of ________.

retina

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ciliary muscles

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iris

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pupil

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Solution

The correct option is B
ciliary muscles

Ciliary muscles expand or contract to adjust the size of the eye lens ; so as to form the final image on the retina.

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Similar questions

The human eye can focus objects at different distances by adjusting the focal length of the eye lens. This is due to

(a) presbyopia

(b) accommodation

(d) far-sightedness

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