State one function of iris in human eye.(All India - 2012)
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In humans and most mammals and birds, the iris (plural: irides or irises) is a thin, circular structure in the eye, responsible for controlling the diameter and size of the pupil and thus the amount of light reaching the retina. Eye color is defined by that of the iris.
Part of: Front of eye
Nerve: long ciliary nerves, short ciliary nerves
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