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There are 2 names in this directory beginning with the letter I.
Iris
The iris is the colored part you see in people's eyes (i.e. blue/green/hazel/brown). The main function of the iris is to control the size of the pupil. This is achieved through contraction or expansion of the muscles of the iris.

Iritis
The iris is the colored part of the eye. It is made up of muscle with a thin layer of pigment on the surface. The iris regulates the amount of light coming into the eye by decreasing the pupil size in bright light and increasing the pupil size in darkness. Iritis, or anterior uveitis, is an inflammation of the iris. The cause of the inflammation of iris tissue is generally unknown. In half of the cases, it is secondary to other inflammations in the body. Iritis can also be caused by trauma to the eye or infection of other parts of the eye. Classic symptoms of iritis involve pain in the eye and sensitivity to light. The intensity of pain and light sensitivity can range from a slight discomfort to severe pain with significant sensitivity to light. Iritis needs to be monitored closely which means frequent visits to the office for re-evaluation. Treatment for iritis may require keeping the pupil of the infected eye dilated. Dilation reduces some of the pain. Steroidal anti-inflammatory agents are usually prescribed. Any changes in your condition other than improvement must be reported as soon as possible. Take special care not to stop your medication suddenly or without permission. Strong rebound reactions might occur. Also, we must watch the pressure of your eye so that you do not develop glaucoma.