Retinal Vein Occlusions

In many cases, an underlying cause of retinal vein occlusion is not found, and we never know why it happens. However, retinal vein occlusion is more common in patients with high blood pressure and diabetes.

When the vein is blocked, tiny blood vessels called capillaries may leak excessive fluid into the retina, causing it to swell. This is called macular edema.

The ultimate visual outcome for patients with retinal vein occlusion varies. About one-quarter of these patients have spontaneous improvement in vision, but in others, the vision remains decreased or even worsens.

One way to treat macular edema is with laser treatment. More recently injections of steroid into the eye is being evaluated.

As is the case with artery obstruction vein blockage can lead to abnormal new vessels in the eye that block the outflow channels allowing the pressure in the eye to rise.

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Risk Factors for CRAO and CRVO

CRVO and CRAO usually occurs in people between the ages of 50 and 70. The most common medical problem associated with CRVO and CRAO is high blood pressure. , Carotid artery disease may also be a factor.

Are there any restrictions or precautions for patients with vascular occlusions?

There is no reason to limit one’s activities (such as reading, watching TV, etc.). However, when you have blurred vision in one eye for any reason, your depth perception is impaired. If this is true for you, you should be very careful doing anything that requires you to judge distances, such as using machinery, climbing ladders, pouring hot or hazardous liquids, or driving.

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