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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.
Feb 20, 2024 · The iris is the colored part of the human eye and a component of the uvea. Also known as the uveal layer or uvea coat, the uvea is a pigmented layer found between the retina and the sclera (white of the eye). In addition to the iris, the uvea also consists of the choroid and ciliary body.
Feb 20, 2022 · What is the iris of the eye? The iris is the colored part of your eye. Muscles in your iris control your pupil — the small black opening that lets light into your eye. The color of your iris is like your fingerprint. It’s unique to you, and nobody else in the world has the exact same colored eye.
Aug 8, 2022 · The iris is a circular, colored structure that sits in front of the lens within the coronal plane towards the front of the eye.
Apr 23, 2022 · The iris helps control the amount of light that reaches the retina in the back of the eye. Muscles in the iris allow the pupil to dilate (widen) to let in more light and constrict (narrow) to let in less light.
Jun 12, 2023 · The iris is the circular coloured part of the eye. It is part of the vascular layer of the eye - the other two components are the choroid and the ciliary body. The central opening of the iris is the pupil. Within the iris there are smooth muscle fibers that control the size of the pupil.
iris, in anatomy, the colored muscular part of the eye surrounding the pupil, the small black opening in the center. The iris is located in front of the lens and behind the cornea. It is bathed in front and behind by a fluid known as the aqueous humor.
Jul 17, 2023 · The iris is a flat and ring-shaped membrane behind the cornea of the eye with an adjustable circular opening in the center called a pupil. This is the structure that provides an individual with...
In this post we discuss in detail the gross, microscopic and clinical anatomy of the Iris. The iris is the anterior most part of the uveal tract. It has 2 surfaces, anterior and posterior. There are 4 layers in iris namely the anterior limiting layer, iris stroma, anterior epithelium, posterior pigmented epithelium.
The iris (plural: irides or irises) is a thin, circular structure in the eye. It controls the diameter and size of the pupils. Eye color is the color of the iris. In humans, the iris may look green, blue, brown, hazel (a combination of light brown, green and gold), grey, violet, or even pink.
