These Laser Burns Are Intended To Cause Abnormal Blood Vessels To Shrink. occur in people with diabetes as blood vessels are damaged by long-term high levels of blood sugar hyperglycaemia . These laser burns are intended to cause abnormal blood vessels to shrink. As the disease progresses, symptoms include: The earliest sign of diabetic retinopathy that your doctor may detect is the formation of micro aneurysms. Thereafter, injections are needed less often: typically three to four during the second six months of treatment, about four during the second year of treatment, two in the third year, one in the fourth year, and none in the fifth year.

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