Retinal Cancer The retina is the transparent, light-sensitive membrane at the back of the eye. Retinal cancers usually start in the choroid, a dense vascular layer that nourishes the retina. The choroid is located between the retina and the sclera (outer, white envelope of the eye). As the vascularization of the retina depends on the … Continue reading Retinal Cancer | Choroidal melanoma, Choroidal metastases, Symptoms, Diagnostic, Treatment