Iris (anatomy)
Part of an eye
Nº Q178748 ★★★
Rare · Knowledge
Iris (anatomy)
Part of an eye
The iris (pl.: irides or irises) is a thin, ring-shaped structure in the eye in most mammals and birds that is responsible for controlling the diameter and size of the pupil, and thus the amount of light reaching the retina. In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm.
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From Wikipedia
The iris (pl.: irides or irises) is a thin, ring-shaped structure in the eye in most mammals and birds that is responsible for controlling the diameter and size of the pupil, and thus the amount of light reaching the retina. In optical terms, the pupil is the eye's aperture, while the iris is the diaphragm. Eye color is defined by the iris.
Text: Wikipédia, CC BY-SA 4.0. · Image: Rossche (CC BY-SA 4.0) ·
