H21: Other disorders of iris and ciliary body
H21.2: Degeneration of iris and ciliary body
The colored iris is located in the center of the eye. There is a black opening in the center of the iris. This is the pupil. The iris also controls how big the pupil is. The ciliary body is located in the eye on the edge behind the round iris. There is a spherical muscle in the ciliary body. This muscle is connected to the lens of the eye by a lot of threads of connective tissue all around it. The muscle can use these threads to change the shape of the lens. The ciliary body also produces the fluid for the inside of the eye.
The area around the iris and the ciliary body can change in various ways. For example, the iris may recede. This can mean that the tissue becomes thinner or weaker. It is also possible for individual parts of the iris to be separated from each other or the color of the iris to change.
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