Can vision come back after retinal artery occlusion?

Sometimes vision improves, especially with smaller branch blockages. A severe central blockage often causes lasting loss.

Should I wait to see if vision clears?

No. Sudden vision loss in one eye needs emergency care now, even if it starts to improve.

What causes a retinal artery blockage?

Common causes include a clot from the heart, plaque from neck arteries, or artery inflammation in older adults.

Can eye drops fix retinal artery occlusion?

No. Eye drops do not reopen a blocked retinal artery. The urgent priority is emergency evaluation and stroke prevention.

Condition

Retinal Artery Occlusion

Also known as Central Retinal Artery Occlusion, Branch Retinal Artery Occlusion, CRAO, BRAO, Retinal Stroke, Eye Stroke

Updated May 16, 2026·For educational purposes only. Not a substitute for medical advice. See our terms.

Bottom Line

Retinal artery occlusion is an eye stroke. Sudden painless vision loss in one eye needs emergency care now.

A retinal artery occlusion happens when blood flow through an artery to the retina is blocked. The retina is nerve tissue, so it can be damaged fast when oxygen stops ¹.

The classic symptom is sudden, painless vision loss in one eye. It may affect the whole view or one area of vision.

This is treated as an emergency because it can signal blocked arteries in the neck, heart rhythm problems, or stroke risk ².

Why It Is an Emergency

Go now. Sudden painless vision loss in one eye can be retinal artery occlusion. Call 911 or go to the emergency room now.

Retinal artery occlusion is often called an eye stroke. It can happen when a clot or plaque blocks blood flow to the retina ¹.

The eye exam is only part of the workup. Doctors also look for blocked neck arteries, heart rhythm problems, and signs of brain stroke ².

How It Is Diagnosed

Diagnosis usually includes:

Vision and pupil check. The affected eye may have a strong pupil reaction change.
Dilated retina exam. The doctor looks for a pale retina or blocked branch artery.
Retina scan. Imaging can show swelling in the inner retina.
Stroke workup. This can include brain imaging, neck artery imaging, heart tests, and blood tests.

People over 50 with new headache or jaw pain need urgent testing for artery inflammation.

Preventing Another Event

After the emergency visit, prevention is key.

Control blood pressure. This is one of the most important steps.
Treat cholesterol and diabetes. These changes protect blood vessels.
Check heart rhythm. Atrial fibrillation can send clots to the eye or brain.
Review carotid arteries. Plaque in the neck can break loose.
Stop smoking. Smoking raises artery risk.

Your eye doctor and medical team should share results so nothing is missed.

Common Questions About Retinal Artery Occlusion

It is a stroke-like blockage in the eye. It also raises concern for brain stroke risk, so emergency workup matters.

Next Steps

1Call 911 for sudden vision loss in one eye.
2Tell emergency staff when the vision loss started.
3Ask whether stroke, heart rhythm, neck artery, and artery inflammation testing is needed.
4Schedule retina follow-up after the emergency evaluation.
5Work with your medical team on blood pressure, cholesterol, diabetes, and smoking.

Find specialists for Retinal Artery Occlusion

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