High blood sugar levels damage the blood vessels,including the tiny blood vessels in the eye.This leads to an eye disease known as diabetic retinopathy(糖尿病型视网膜病).The retina (视网膜)is an area at the back of the eye that changes light into nerve signals.With diabetic retinopathy,some blood vessels in the retina are lost,and some of the other blood vessels begin toleakblood This causes the retina to swell.and gradually cuts off its supply of oxygen and nutrients(滋养物).Eventually,the retina starts to grow new blood vessels to replace the damaged ones.Unfortunately,these new vessels are not as strong as the old ones They are more likely to break,causing bleeding in the eye
At first,people with diabetic retinopathy will not notice any symptoms.As the disease gets worse,they may notice blurred(模糊的)vision,black spots or flashing lights.As time goes on,it Can progress to blindness Everyone with diabetes is at risk for diabetic retinopathy,and the risk increases the longer youve had diabetes
Fortunately,you can reduce your risk If you do not have diabetes,but think you may be at risk for this condition.visit your doctor to be screened for diabetes.If you d0 have diabetes:
Have frequent eye check-ups.
Make sure that you monitor your blood sugar frequently and use your medications as recommended by your doctor There is evidence to show that keeping your blood sugar under tight control can slow down eye damage
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