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The iris ( pl.: irides or irises) is a thin, annular structure in the eye in most mammals and birds, 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. Etymology[edit]
Iris is a flowering plant genus of 310 accepted species [1] with showy flowers. As well as being the scientific name, iris is also widely used as a common name for all Iris species, as well as some belonging to other closely related genera.
Places. Science and technology. Transportation. Other uses. See also. Iris. Look up Iris or iris in Wiktionary, the free dictionary. Iris most often refers to: Iris (anatomy), part of the eye. Iris (color), an ambiguous color term. Iris (mythology), a Greek goddess. Iris (plant), a genus of flowering plants. Iris or IRIS may also refer to:
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In ancient Greek religion and mythology, Iris (/ˈaɪrɪs/; EYE-riss; Greek: Ἶρις, translit. Îris, lit. "rainbow,"[2][3] Ancient Greek: [îːris]) is a daughter of the gods Thaumas and Electra,[4] the personification of the rainbow and messenger of the gods, a servant to the Olympians and especially Queen Hera.[5] Iris appears in several ...
References. List of Iris species. Subgenus Iris. Stool iris ( Iris aphylla) flower. Note prominent white "beard". Iris reichenbachii. Iris tigridia from Russia. Bearded rhizomatous irises. Section Iris. Nazareth Iris, Iris bismarckiana. Iris arenaria (formerly Iris humilis subsp arenaria) Subgenus Limniris.
References. External links. Eye color. The irises of human eyes exhibit a wide spectrum of colours. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye 's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [3] : 9.
Kakitsubata at Ōta Shrine, Kyoto, is a National Natural Treasure. It was already recorded in a tanka by Fujiwara Toshinari also in the Heian period : Ayame. The ayame (アヤメ, 菖蒲, 文目, Iris sanguinea) is the iris typically growing wild on the dry land in Japan. Characteristics.
