It occurs when diabetes damages the tiny blood vessels inside the retina, which is the light-sensitive tissue at the back of the eye.
Having good vision is predicated on a healthy retina. Diabetic retinopathy usually affects both eyes.
There are four stages of Diabetic Retinopathy: Mild, Moderate, Severe, and Advanced.
The early stage of Diabetic Retinopathy may not have any noticeable side affects, such as partial vision loss, but micro-aneurysms cause swelling in the retina's tiny blood vessels.
As the stages progress and worsen, the retina becomes increasingly affected, which leads to vision degradation and ultimately vision loss. Read more