Vein Occlusion

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 these vessels. A block in these veins that 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. Symptoms include sudden blurring or loss of vision, which worsens 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:

  • Ranibizumab Injection
  • Dexamethazone implant
  • 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.

 

Vein Occlusion Macular 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 these vessels. These blocked arteries cross over retinal veins, exerting pressure on them and disrupting the flow of blood. A block in these veins that carry blood away from the retina can lead to a condition known as retinal vein occlusion (RVO).

The elderly are most often affected by retinal vein occlusion. The condition may be painless and often occurs in only one eye. Symptoms include sudden blurring or loss of vision, which worsens over time. Some patients may experience complete loss of vision.

When left untreated, retinal vein occlusion can lead to further complications such as macular edema. The macula is found at the back of the eye, on the center of the retina, and consists of nerve cells, which are responsible for the perception of light. Over the course of their illness, due to poor blood flow to the retina, patients with retinal vein occlusion develop abnormality in the blood vessels. Theseblood vessels tend to leak fluid into the macula. leading to vision problems including blurry vision and eye floaters (moving spots in the field of vision).

Vein occlusion macular edema can be treated with a procedure known as: Intravitreal Injection

If you suffer from any of the symptoms mentioned above, please contact NMC EyeCare for a complete visual examination.