New blood vessels 2. Fluid New blood vessels grow at the back of the eye and these new blood vessels are abnormal blood vessels. New blood vessels are potentially devastating to the eye and untreated cause severe visual loss. Early and effective treatment significantly reduces the risk of visual loss. New blood vessels cause bleeding and scarring and destruction of the delicate tissue at the back of the eye.
Laser treatment causes the new blood vessels to disappear.
Fluid may collect at the back of the eye. Fluid collects when the blood vessels at the back of the eye leak, rather like a river bursting its banks. Fluid damages the delicate structures at the back of the eye. Laser treatment dries up the fluid. Diabetes, blockage of a vein or an artery at the back of the eye are the commonest conditions which require laser treatment.