Retinal Vein Occlusions
A Retinal Vein Occlusion occurs when a vein (a vessel that drains blood out of the eye) is blocked. A blocked vein prevents blood brought into the eye from leaving the eye effectively. This damages the smaller blood vessels called capillaries that are responsible for delivering oxygen and nutrients to the retina. The damage appears as hemorrhages and edema within the retina. The lack of oxygen delivery to the retina results in damage to the retina and results in a decrease of vision.
Additionally, the loss of blood flow can trigger the eye to grow new blood vessels that can break and bleed resulting in a vitreous hemorrhage. These new vessels can at times lead to tractional retinal detachments.
We treat branch retinal vein occlusions most commonly with a combination of intravitreal Anti-VEGF agents and laser. Central retinal vein occlusions are treated with intravitreal Anti-VEGF agents. However, if a vitreous hemorrhage is present, vitrectomy surgery may be recommended.
There are 2 types of Retinal Vein Occlusions:
1. Branch Retinal Vein Occlusions
After Treatment with Anti-VEGF agents
2. Central Retinal Vein Occlusions