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Retinal vein occlusions

A retinal vein can become blocked, like an obstructed pipe. Blood and fluid then accumulate in the retina and may cause sudden but painless loss of vision. Seek advice promptly.

Signs and forms

Sudden loss of vision in one eye, or a dark spot in the visual field, without pain. A distinction is made between central vein occlusion (widespread involvement) and branch vein occlusion (involvement of one area).

Causes and associated factors

High blood pressure, diabetes, cholesterol, smoking, age, glaucoma and certain blood or inflammatory diseases. A general assessment with your usual doctor (médecin traitant) is often requested to identify the cause and limit the risk of recurrence.

Treatment

The main complication is macular oedema, treated with intravitreal injections (anti-VEGF or corticosteroids) and sometimes laser. In some forms involving abnormal blood vessel growth, laser treatment to the peripheral retina protects against more serious complications.

Follow-up

Regular check-ups with OCT are scheduled, more frequently at first. Eye pressure is monitored, as glaucoma may develop later.

Frequently asked questions

Is it an emergency?

Yes. Any sudden reduction in vision, even without pain, warrants a prompt ophthalmic opinion (see emergencies).

Can vision be recovered?

Improvement is possible, particularly after treatment of oedema; the result depends on the extent of damage and how quickly care begins.

Can it affect the other eye?

There is a risk, hence the need to control general risk factors and monitor both eyes.

Learn more

Our doctors

In the event of sudden loss of vision or pain, see eye emergencies.

A question about your situation?

Your ophthalmologist answers your questions during the consultation. For a sudden symptom or sudden loss of vision, seek advice promptly: see the eye emergencies page.

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