The iris is a circular, pigmented membrane that provides the eye its color and the opening in the center is the pupil of the eye.
The iris is made up of muscular fibers that control the amount of light entering the pupil so that you can see clearly. The iris accomplishes this task by making the pupil smaller in bright light and larger in dim light.
Uveitis means you have inflammation -- heat, redness, pain, and swelling -- in one or both of your eyes. It can cause vision loss, but there are many ways to treat it.The key is to see a doctor as soon as you start to notice a problem. If you get treatment early, you can ease your symptoms and protect your vision.
Uveitis gets its name from the uvea, the middle layer of the eye, which includes the iris (the colored part). Sometimes it’s also called iritis. The inflammation can also happen in other...