Retinal vein occlusion (RVO) happens when a vein carrying blood away from the retina becomes blocked. People sometimes call it an “eye stroke,” but it is different from a retinal artery occlusion and needs an eye specialist to diagnose. The blockage can cause bleeding and fluid leakage, including swelling of the macula, which may blur central vision. Prompt assessment by a medical retina specialist such as Dr. Sonam Angmo Garg can identify the type of occlusion and any complications.

Causes and risk factors

There are two main forms: central retinal vein occlusion (CRVO), affecting the main vein, and branch retinal vein occlusion (BRVO), affecting a smaller branch. A blood clot or compression of the vein can contribute. Risk is higher in people with conditions such as high blood pressure, diabetes, glaucoma and vascular disease. A clinician may recommend checking general health factors as part of care, since eye and systemic health are connected.

Symptoms to recognise

RVO can cause sudden or gradual blurred or reduced vision in one eye. Some people notice floaters, dark patches or a distortion in central vision. Symptoms may be painless, so absence of pain does not make the problem harmless. Sudden vision change should be assessed urgently, even if it partly improves. If severe sudden vision loss occurs or other neurological symptoms appear, seek emergency medical care immediately.

Immediate steps

1. 1. Contact an ophthalmologist or emergency eye service promptly. Explain when the change began, which eye is affected and whether vision is worsening.
   2. Do not drive yourself if your vision is impaired. Ask someone to accompany you.
   3. Bring a medicine list and relevant medical history, including diabetes, blood pressure, glaucoma and prior eye treatments.
   4. Do not wait for a routine appointment or use leftover eye drops as a substitute for assessment.

At the visit, the doctor may dilate the pupil to examine the retina and use OCT to measure macular swelling. Fluorescein angiography or other imaging may help map blood flow and leakage. These tests guide a treatment plan and help monitor change.

Treatment and follow-up

Treatment depends on the type of RVO and its effects. Injections inside the eye may reduce macular edema; laser may be used for selected complications, such as abnormal vessel growth, or in specific patterns of disease. Treatment cannot simply remove the blockage, so care focuses on reducing complications and protecting remaining vision. Follow-up is important even when symptoms improve, because swelling or abnormal vessels can develop later. Managing blood pressure, blood sugar and other vascular risks is also part of the plan in coordination with your medical team.

Frequently asked questions

1. 1. Is retinal vein occlusion the same as a brain stroke? No, but it is a serious vascular eye condition. Sudden vision loss still needs urgent assessment.
   2. Can it affect both eyes? It usually presents in one eye, but risk factors and eye health should be reviewed for both eyes.
   3. Will vision return completely? Outcomes vary with severity, location, complications and response to treatment. An examination is needed to discuss an individual outlook.

For related clinic services, read about Retinal Vascular Occlusion Treatment and Intravitreal Injections.