<Tr> <Th> FMA </Th> <Td> 58235 </Td> </Tr> <Tr> <Td_colspan="2"> Anatomical terminology (edit on Wikidata) </Td> </Tr> <P> 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 . In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm . </P> <P> The iris consists of two layers: the front pigmented fibrovascular known as a stroma and, beneath the stroma, pigmented epithelial cells . </P>

Name and describe the colored part of the eye
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