What is scarring on the retina?

Damage. The retina can develop scars much the same way that any other tissue can. The most common cause of scarring is from bleeding (examples: diabetes, macular degeneration), and from lasers used to treat the bleeding. Retinal repair of any kind can lead to bleeding, as can severe trauma to the eye.
Retinopathy. Retina is the inner most layer of the eye that can be affected by uncontrolled diabetes or uncontrolled hyigh blood pressure. These conditions can either lead to fragile new vessel development or the bleeding of the existing vessels. When these heal by either laser or by themselves , it usually leads to retinal scarring.Sometimes these scars can contract and lead to retinal detachment.
Retinal scars. The retina is the lining of the back of your eye where all the light-detecting cells lie. A scar is damage to the retinal. This can happen from staring at the sun which causes a burn, from interruption to blood flow as can happen in certain diseases or from infection. Depending on where the scar is, it may not cause any trouble or can cause vision loss including blindness.