Approved by the Cancer.Net Editorial Board, 09/2021
ON THIS PAGE: You will find a drawing of the main parts of the eye affected by retinoblastoma. 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 the factors that may increase the chance of developing retinoblastoma. Use the menu to choose a different section to read in this guide.