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Learn about the different types, colors, and features of irises, a popular flower that attracts butterflies and hummingbirds. Find out how to plant, grow, and care for irises in full sun and well-draining soil, and how to divide them for more blooms.
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The iris is the colored part of the eye that controls the size of the pupil and regulates the amount of light entering the eye. Learn about the structure, function, and variations of the iris, as well as its relation to eye color and inflammation.
- The Editors of Encyclopaedia Britannica
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]
Apr 11, 2024 · iris, (genus Iris), genus of about 300 species of flowering plants, including some of the world’s most popular and varied garden flowers. The diversity of the genus is centerd in the north temperate zone, though some of its most handsome species are native to the Mediterranean and central Asian areas.
- The Editors of Encyclopaedia Britannica
Iris is a flowering plant genus of 310 accepted species 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.
Feb 20, 2022 · Learn about the iris, the colored part of your eye that controls your pupil and helps you see in different lighting. Find out how to keep your iris healthy and what problems can affect it.
Aug 8, 2022 · Learn about the iris, the colored part of the eye that regulates light and focus. Find out about its anatomy, function, associated conditions, and tests.
