H21.1: Other vascular disorders 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 blood vessels around your iris or your ciliary body have changed. Blood vessels can change in different ways. Lots of new blood vessels can emerge, for example. The blood vessels can also be more sensitive due to the changes. This can lead to bleeding from these blood vessels.

The individual parts of the eye are connected by an opening. If changed blood vessels close this opening, then the fluid in the inside the eye cannot drain properly. This can increase the pressure inside the eye. Increased pressure in the eye can lead to a person not being able to see as well as they normally can or their eye becoming very sore. However, you can also have changes in the blood vessels in the eye without them producing any symptoms.