Vein Occlusin Mascular Edema
The retina is the layer of tissue present at the back of the eye. It changes the light that enters the eye into nerve signals, which are transmitted to the brain for interpretation. Blood vessels supply oxygen and nutrients to the retina to keep it in working condition. As you age, atherosclerosis (hardening or thickening) and clot formation can occur in thesevessels. These blocked arteries cross over retinal veins, exerting pressure on them and disrupting the flow of blood. A block in these veinsthat carry blood away from the retina can lead to a condition known as retinal vein occlusion (RVO).There are two types:
- Central retinal vein occlusion (CRVO): The block occurs in the central/main retinal vein.
- Branch retinal vein occlusion (BRVO): The block occurs on the surface of the retina, where the main retinal vein branches into smaller veins.
The elderly are most often affected by retinal vein occlusion. The conditionmay be painless and often occurs in only one eye. Symptoms include sudden blurring or loss of vision, whichworsens over time. Some patients may experience complete loss of vision.
Some of the risk factors for retinal vein occlusion include smoking, hypertension, diabetes, hypercholesterolemia, atherosclerosis, and other eye conditions such as glaucoma.
Vein occlusion can be treated with:
- Macular Laser
- Panretinal Photocoagulation
When left untreated, retinal vein occlusion can lead to further complications such as macular edema (fluid buildup in the macula, present in the center of the retina) and neovascularization (growth of new abnormal blood vessels in the retina) leading to further worsening of vision.
If you experience problems in your vision or suffer from any of the symptoms mentioned above, please visit NMC EyeCare immediately.