Anti-veg drugs are injected into the vitreous gel to block a protein called vascular endothelial growth factor VEGF, which can stimulate abnormal blood vessels to grow and leak fluid. It's caused by damage to the blood vessels of the light-sensitive tissue at the back of the eye retina. This condition is called proliferative retinopathy. You have pain in one of your eyes. This may sound good, but these new blood vessels are weak. Mayo Clinic does not endorse companies or products. Diagnosis of retinopathy is generally made by an eye specialist called an ophthalmologist. Mayo Clinic does not endorse companies or products.

Most of the time, it gets worse over many years. Sickle cell anaemia also affects the blood vessels in the eyes.  Hypertensive retinopathy. In this way, the damaged vessels and abnormal new vessels are identified.  Diabetic retinopathy — Controlling blood sugar and blood pressure can slow or halt the progress of the disease.