How does the eye adjust itself to deal with light of varying intensity?
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The eye adjusts itself to deal with ight of vaying intensity with the help of the iris. The iris automatically adjusts the size of the pupil according to the intensity of light received by the eye. If the intensity of light is large, then iris contracts the pupil and reduces the amount of light entering the eye. And, if the inteintensity of light is small, then iris expands the pupil so that more light may enter the eyes.
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