Abstract
In this chapter, we review the established classification system of diabetic retinopathy and diabetic macular edema. Reversible and non-reversible causes of vision loss in diabetic patients are discussed with illustrative clinical examples.
Keywords: Diabetic retinopathy, Epiretinal membrane, Macular edema, Macular ischemia, Neovascular glaucoma, Tractional retinal detachment, Vitreomacular traction.