What is the functions of iris?
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the iris is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil and thus amount of light reaching the retina
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the coloured part of of the eye which helps regulate the amount of light entering the eye.when there is bright light,the iris close the pupil to let the in less light.and where there is low light, the iris opens up the pupil to let in more light.focuses light rays into the retina.
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