Iris
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Iris, Ciliary Body and Choroid Functions
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Applications Digitize and automate patients and customers management with our first-class document software. Applications Hotel reception counter Car rental desk Telecom centers Bank administrations Hospital reception counter Overview. Processes IRIS document solutions add value to business processes of organizations of any size in any industry. By Gary Heiting, OD. No, the uvea is not that little lobe of tissue that dangles from the back of your mouth when your doctor tells you to open wide and say "Ahh!
The uvea is the pigmented middle layer of the eyeball.
Iris (plant) - Wikipedia
It has three segments: The iris of the eye is the thin, circular structure made of connective tissue and muscle that surrounds the pupil. The color of our eyes is determined by the amount of pigment in the iris.
The second part of the uvea is the ciliary body. It surrounds the iris and cannot be seen because it's located behind the opaque sclera white of the eye. The posterior portion of the uvea is the choroid, which is sandwiched between the tough outer sclera of the eyeball and the retina in the back of the eye.
In addition to giving the eye its color, the iris acts like the diaphragm of a camera and controls the size of the pupil. One muscle within the iris constricts the pupil in bright light full sunlight, for example , and another iris muscle dilates enlarges the pupil in dim lighting and in the dark.
Iris (anatomy)
The ciliary body holds the lens of the eye in place. It is connected to the lens with a network of many tiny ligaments called ciliary zonules or zonules of Zinn that suspend the lens in place behind the pupil. The ciliary body also secretes the clear aqueous fluid that fills the space in the anterior segment of the eye between the cornea and the iris and lens, and it contains the muscle that controls accommodation of the eye.
A number of things can go wrong with the uvea. Some uvea problems are genetic, while others are age-related conditions or are associated with other health problems. This is inflammation of the uvea.
When confined to the iris, it's called iritis. If the inflammation affects the iris and the ciliary body, it's called anterior uveitis or iridocyclitis. There are many potential causes of uveitis, but often the cause cannot be determined.
In humans and most mammals and birds, the iris (plural: irides or irises) is a thin, circular structure in the eye, responsible for controlling the diameter and size of. Iris or IRIS may refer to: Iris (anatomy), part of the eye; Iris (color), an ambiguous color term, usually referring to shades ranging from blue-violet to violet; Iris.
Symptoms include a painful red eye , sensitivity to light and decreased visual acuity. Pronounced "si-NECK-ee-ah," this is when parts of the iris adhere to the back surface of the cornea or the front of the lens. Synechiae plural; pronounced "si-NECK-ee-ee" can occur because of trauma to the eye, iritis or other causes.
Synechiae are dangerous because they can lead to certain types of glaucoma. This is a congenital disorder where a portion of normal iris tissue is missing, causing a misshapen "keyhole" or "cat-eye" appearance to the pupil.
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