@frsufi - It can be reversed. You need to get tight control of your Blood Sugars and watch what you are eating.
In 2013 I had my 13th Retinal Screening and I received a letter shortly afterwards saying I had "Background Retinopathy".
I went to see my GP and he pointed out to me to loose some weight, tighten control and watch my diet. I did as he instructed and my next (14th) Retinal Screening was 'normal' and continues to be.
Diabetic Retinopathy:
People with Diabetes can be at risk of developing this especially if their Blood glucose levels are high over a long period of time. The effect of Diabetic Retinopathy can be serious and include reduced vision and sudden loss of sight.
Tiny blood vessels in the retina become damaged. Little blisters can developed on these blood vessels and can burst and bleed into the retina.
That's why it is important to have a yearly Retinal Screening where photographs are taken of the eyes and any changes and/or damage will be picked up.