ON THIS PAGE: You will find a drawing of the main body parts affected by this disease. Use the menu to see other pages.
The sclera is the outer wall of the eyeball. The choroid is a layer of tissue between the sclera and the retina. The retina is the thin layer that lines the eyeball and is connected to the optic nerve. The iris is the colored part of the eye. In the center of the iris is the pupil. The iris and pupil are covered and protected by a clear cornea. Copyright 2004 American Society of Clinical Oncology. Robert Morreale/Visual Explanations, LLC.
The next section in this guide is Risk Factors. It explains what factors may increase the chance of developing this disease. You may use the menu to choose a different section to read in this guide.