good diabetic doctors near me Types of Diabetic Retinopathy: Non-Proliferative Diabetic Retinopathy (NPDR): Early stage. Blood vessels in the retina weaken and may leak fluid or blood, leading to swelling of the macula (central part of the retina). Vision can become blurry. Proliferative Diabetic Retinopathy (PDR): Advanced stage. Abnormal new blood vessels grow on the surface of the retina, which can bleed into the vitreous (the gel-like substance in the eye). This can cause severe vision loss or retinal detachment.