Cancers affecting the retina

[Hina Muqadas]

The retina is the transparent, light-sensitive structure at the back of the eye. Cancers affecting the retina usually occur in the choroid, a dense layer of blood vessels that supplies the retina. The choroid is sandwiched between the retina and the sclera (the outer white layer of the eye). Because the retina depends on the choroid for its support and half of its blood supply, damage to the choroid by a cancer is likely to affect vision.