The size of the pupil is controlled by the:

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(D) The pupil is the aperture in the center of the iris.Its size is regulated by the contraction and relaxation of the smooth muscles present in the i

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Iris

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(D) The pupil is the aperture in the center of the iris.Its size is regulated by the contraction and relaxation of the smooth muscles present in the iris.When light intensity is high,the circular muscles of the iris contract,making the pupil smaller.When light intensity is low,the radial muscles of the iris contract,making the pupil larger.Therefore,the iris controls the amount of light entering the eye by adjusting the size of the pupil.

Column-$I$ (Chamber)	Column-$II$ (Description)
$P$. Aqueous chamber	$I$. Filled with transparent gel
$Q$. Vitreous chamber	$II$. Space between cornea and lens
	$III$. Space between lens and retina
	$IV$. Filled with thin watery fluid

Similar Questions

Which cranial nerve innervates the lateral rectus muscle of the eye?

In the human eye,the image formed on the retina is:

Match the following columns regarding the chambers of the human eye:
Column-$I$ (Chamber) Column-$II$ (Description)
$P$. Aqueous chamber $I$. Filled with transparent gel
$Q$. Vitreous chamber $II$. Space between cornea and lens
$III$. Space between lens and retina
$IV$. Filled with thin watery fluid

Short-sightedness or myopic vision is corrected by wearing:

In $presbyopia$:

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