How does diabetic retinal disease (diabetic retinopathy) affect the vision?
Swelling (edema) in the central part of the retina (macular edema) can cause blurring of fine vision. Fragile new blood vessel sprouts may break and bleed into the interior of the eyeball, causing blurring of the entire field of vision. In the early stages of the disease the vision remains good, therefore, the disease may escape notice. That is why it is essential to have regular retinal examinations if you know that you have diabetes.
