What is the retinal pigment epithelium (RPE), choroid, and sclera in the retina?
Retinal pigment epithelium (RPE) is a layer of dark tissue beneath the photoreceptors. These cells absorb excess light so the photoreceptors can give a clearer signal. They also move nutrients to (and waste from) the photoreceptors to the choroid.
The choroid is separate from the RPE. It lies behind the retina and is made up of many fine blood vessels that supply nutrition to the retina and the RPE.
Sclera is the tough, white, fibrous outside wall of your eye. It’s connected to the clear cornea in front and protects the delicate structures inside the eye.
THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.
This tool does not provide medical advice. See additional information.