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Vein Occlusions

Retinal Vein Occlusion

A retinal vein occlusion occurs when a vein in the retina is blocked. A blocked vein damages the blood vessels of the retina. Hemorrhages (bleeding) and leakage of fluid occur from the areas of blocked blood vessels.

There are two types of Retinal Vein Occlusions:

Central Retinal Vein Occlusion (CRVO)

When the main vein of the eye (located at the optic nerve) becomes blocked.

Branch Retinal Vein Occlusion (BRVO)

When one of the smaller branches of vessels attached to the main vein becomes blocked.

Complications and symptoms of Retinal Vein Occlusion

Macular Edema

If blood and fluid leak into the central part of the retina called the macula, swelling occurs. Macular edema causes blurred vision, decreased vision or both.

Abnormal blood vessel growth (neovascularization)

Retinal vein occlusion can cause abnormal vessels to grow on the retina. These new vessels are very fragile and may bleed or leak fluid into the vitreous – the gel-like substance that fills the center of the eye. Small spots or clouds in your field of vision called floaters can appear.

Pain in the Eye

In severe cases of CRVO, a blocked vein causes abnormal blood vessel growth on the iris and drainage in the front of the eye, leading to painful pressure in the eye (neovascular glaucoma).

Retinal Vein Occlusion Treatment

There is no known cure for retinal vein occlusion, though in some cases intraocular injection, laser surgery, or an operation may be used to reduce the macular edema and stabilize or improve vision.

BRVO and CRVO Injection Treatment

BRVO Medication Injections

CRVO Injections Laser

Retinal Vein Occlusion Risk Factors

Certain illnesses increase your risk for developing retinal vein occlusion, including:

  • Diabetes
  • Glaucoma
  • High Blood Pressure
  • Age-related vascular (blood vessel) disease
  • Blood disorders

If a retinal vein occlusion occurs in one eye, there is an increased chance of about 10 percent that a Branch or Central Vein Occlusion will occur in the other eye in the future. This may be prevented by properly managing the above-mentioned health conditions that contribute to this eye problem.

François D. Trotta and the team at Idaho Retina are delighted to serve people in the Boise, Meridian, Nampa and the Caldwell areas. Call us today to schedule your Vein Occlusion screening.


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128 E. Mallard Dr.
Boise, ID 83706
Fax: 208-323-8686