Retinopathy can signal coronary heart disease. Retinal abnormalities usually have no symptoms in the early stages.
D003327:Coronary Disease / Q000175:diagnosis* / Q000401:mortality; D003930:Diabetic Retinopathy / Q000145:classification / Q000175:diagnosis / Q000503:physiopathology*; D006801:Humans; D012720:Severity of Illness Index