<unk>  is any damage to the retina of the eyes, which may cause vision impairment.<unk>  often refers to retinal vascular disease, or damage to the retina caused by abnormal blood flow. Age-related macular degeneration is technically included under the umbrella term<unk>  but is often discussed as a separate entity.<unk> , or retinal vascular disease, can be broadly categorized into proliferative and non-proliferative types. Frequently,<unk>  is an ocular manifestation of systemic disease as seen in diabetes or hypertension. Diabetes is the most common cause of<unk>  in the U.S. as of 2008. Diabetic<unk>  is the leading cause of blindness in working-aged people. It accounts for about 5% of blindness worldwide and is designated a priority eye disease by the World Health Organization.
Retinopathy
Maculopathy
Optic neuropathy
Peripheral neuropathy
Color blindness
Arthropathy
Retinal degeneration 
Ocular hypertension