The pupil becomes bigger to allow more light | vedclass

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(A) The size of the pupil is regulated by the iris muscles.In dim light or darkness,the radial muscles of the iris contract.This contraction pulls the

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Contraction of radial muscles of the iris

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(A) The size of the pupil is regulated by the iris muscles.In dim light or darkness,the radial muscles of the iris contract.This contraction pulls the iris outward,causing the pupil to dilate (become larger).This process allows more light to enter the eye to improve vision in low-light conditions.Therefore,the correct mechanism is the contraction of the radial muscles of the iris.

The pupil becomes bigger to allow more light during dark by the:

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