Retinal migraine: vision loss in one eye, and why doctors check other causes first
Retinal migraine affects one eye and is extremely rare, so a first episode of one-eye vision loss is treated as an emergency until an eye stroke and other causes are ruled out. Here are the symptoms, the tests, what the evidence says about treatment, and how to talk to your doctor.
Short answer
Retinal migraine is a rare type of migraine with repeated, fully reversible attacks of visual disturbance in one eye only — flickering, a blind spot or temporary blindness — usually lasting 5 to 60 minutes and linked to a migraine headache (1). The international headache classification calls it "an extremely rare cause of transient monocular visual loss," and it is diagnosed only after other causes, including blocked or narrowed arteries, have been ruled out (1, 2).
That is why sudden vision loss in one eye should be treated as an emergency first and a possible migraine second: a blockage of the retina's main artery is a form of stroke with a narrow treatment window (3). If half your sight in one eye went dark and you are frightened, you are not imagining it and you are not overreacting — getting checked fast is exactly the right call.
Note: This article explains research. It is not medical advice and it does not diagnose migraine. Sudden vision loss in one eye, blurred or double vision, weakness on one side of the body or face, or trouble speaking needs emergency care — call 911 and do not drive yourself (3, 4). This guide is published by Welltory, which makes one of the apps mentioned.
If you live with migraine and want to work through this with other women who get it, Welltory runs a paid peer-support program: join Migraine Lab here (what Migraine Lab is, who it is for and what it costs). It is education and peer support, not medical care.
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What is a retinal migraine?
The retina is the light-sensitive layer at the back of the eye. In retinal migraine, the visual symptoms are thought to start in the eye or its blood supply, rather than in the visual part of the brain as with a usual migraine aura.
The ICHD-3, the classification headache doctors use, sets out what has to be true for this diagnosis (1):
The attacks meet the criteria for migraine with aura.
The visual symptoms are in one eye, fully reversible, and can be positive (scintillations, flickering) or negative (a blind spot, blindness).
The one-eye nature is confirmed during an attack by a visual field exam, or by the patient's drawing of a one-eye field defect made after clear instructions — or both.
At least two of these: the symptoms spread gradually over 5 minutes or more; they last 5 to 60 minutes; a headache comes during the visual symptoms or within 60 minutes.
The attacks are not better explained by another diagnosis, and other causes of amaurosis fugax (temporary one-eye blindness) have been excluded.
Point 5 is the heart of it. A 2021 review in Vision puts it directly: retinal migraine "should be considered a diagnosis of exclusion, which requires other causes of transient monocular visual loss to be excluded" (2).
Vision loss in one eye: when it is an emergency
Because the symptoms of retinal migraine overlap with eye strokes and warning signs of stroke, the safe order of thinking is: emergency first, label later.
Call 911 (do not drive yourself) if you have:
Sudden vision loss in one eye, even if painless and even if it returns. The American Heart Association describes central retinal artery occlusion — a blocked main artery of the retina — as "a rare form of acute ischemic stroke" that causes painless, immediate vision loss in the affected eye. It notes a narrow time window for effective treatment and calls eye strokes "a warning of future brain strokes" (3).
Sudden blurred or double vision (4).
Weakness or numbness on one side of your body or face, problems speaking, confusion or a seizure (5).
A sudden, extremely painful headache (5).
Get urgent same-day help if:
You have a blind spot or other vision problem in one eye for the first time (4).
You see new floaters, flashes of light or a dark "curtain" moving across your vision — possible signs of a detached retina (6).
A visual disturbance lasts longer than 1 hour (5).
Book a doctor's appointment if episodes are getting worse, more frequent or different from your usual pattern (4).
Even if your vision is back to normal by the time you reach a doctor, say so clearly: "I lost vision in my right eye for 15 minutes." A short episode that has passed still needs to be explained.
Retinal migraine symptoms
Retinal migraine affects one eye. The NHS lists vision loss, a blind spot, visual disturbances such as flashing lights, and a headache (4). People describe:
Dimming or blackout of all or part of the vision in one eye.
A blind spot (scotoma) in the center or at the edge of one eye's vision.
Loss of the top or bottom half of one eye's field, or of a sector of it.
Flickering, sparkles or twinkling lights in one eye.
A headache before, during or within an hour after the visual symptoms, often on the same side (1).
Interestingly, published cases are mostly about missing vision rather than sparkles. The 2021 review notes that most reported cases involve negative symptoms such as a central blind spot, loss of the upper or lower half, or sector loss — 12 of 16 cases in one series and 11 of 12 in another (2). That is exactly the kind of vision loss that also happens in eye strokes, which is another reason doctors are careful.
How long does a retinal migraine last?
The NHS says the vision loss usually lasts around 5 to 20 minutes but can sometimes last up to 1 hour (4). The diagnostic criteria use 5 to 60 minutes (1). An older case series described episodes that mostly lasted under 10 minutes (2). Vision that has not come back after an hour is not "a long migraine" — it is a reason for urgent care.
Retinal migraine vs ocular migraine and migraine with aura
People often use "ocular migraine" for any migraine that affects vision. Mayo Clinic says the term usually describes migraine with aura and, less often, retinal migraine (7). The NHS also notes that retinal migraines are "sometimes known as ocular migraines" (4). The labels overlap; the eyes do not.
| | Migraine visual aura | Retinal migraine |
|---|---|---|
| Where it starts | the brain's visual cortex | the eye (retina or its blood supply) |
| Eyes affected | both eyes, same side of the visual field | one eye only |
| Typical look | zigzags or shimmering that drift slowly | dimming, blind spot or blackout, sometimes flickering |
| How common | about a third of people with migraine have aura (8) | "extremely rare" (1) |
| First step after a first episode | see a doctor soon | urgent care to rule out an eye stroke |
The "one eye" trap
Here is the catch: a visual aura that covers the same half of the field in both eyes often feels like it is in one eye. The Vision review explains that people often describe these both-eyes symptoms as one-eye symptoms, partly because the eye on that side sees more of that half of the field (2). The ICHD-3 makes the same point: some patients who report one-eye symptoms actually have a half-field loss in both eyes (1).
If it is safe to do so (you are not driving), a quick observation helps your doctor:
Cover your left eye and look at a plain wall. Is the disturbance there?
Cover your right eye. Is it there now?
If it is visible with either eye, it is likely a both-eyes aura.
If it vanishes completely when you cover one particular eye, it may be in that eye only — get urgent help.
Afterward, draw what you saw and note the start and end times.
This is not a self-test that rules anything out. It simply gives your doctor better information.
How doctors diagnose retinal migraine
There is no single test that proves retinal migraine. The diagnosis comes from a careful history plus tests that exclude other causes. The 2021 Vision review lists the usual steps: a detailed history, formal visual field testing, photographs of the back of the eye, optical coherence tomography (OCT, a quick scan of the retina's layers), an ultrasound (Doppler) of the carotid arteries in the neck, and blood markers of inflammation if an inflamed artery is suspected (2). A Romanian review also recommends that neurologists and ophthalmologists work on these cases together (9).
What doctors rule out first
The Vision review names the main look-alikes (2):
Amaurosis fugax from artery disease — temporary blindness in one eye because of reduced blood flow, often from a narrowed carotid artery. Linked to atheromatous disease, it carries about a 2% risk of recurrent stroke at 1 year, and up to 16% risk of stroke on the same side at 3 years with severe carotid narrowing.
Central retinal artery occlusion — an eye stroke (3).
Giant cell arteritis — inflamed arteries that can cut blood supply to the eye.
Other eye and nerve causes — reduced blood flow to the layer under the retina, angle-closure glaucoma, swelling of the optic nerve, compression of the optic nerve and even dry eye.
Ruling these out is not a sign that your doctor doubts you. It is how a diagnosis of exclusion works, and some of the alternatives need treatment within hours.
Work out your early warning signs with women who get it
Welltory Migraine Lab is a paid, moderated online community for women 18 to 65 living with migraine. Opens December 1, 2026. Peer support and education, not medical care.
What causes retinal migraine?
Nobody knows for sure. The NHS states plainly that "it's not known what causes retinal migraine" (4). Researchers have proposed two main ideas (2):
Blood vessel spasm. A temporary narrowing of the central retinal artery or the ophthalmic artery. Some case reports showed slowed retinal circulation or narrowed retinal vessels during an attack.
A spreading wave in the retina. A retinal version of the cortical spreading depression that is thought to cause the usual brain aura. The review notes this "has not directly been demonstrated in humans to date."
Some experts even question whether "retinal migraine" is the right name, because a usual migraine aura is a brain process; the review describes the term as "potentially confusing and anatomically incongruous" (2). For the bigger picture of how migraine works in the brain, see migraine explained.
Possible triggers
The NHS lists possible triggers including stress, caffeine and alcohol, dehydration, smoking, high blood pressure and low blood sugar, and suggests keeping a diary to find your own (4). Cleveland Clinic adds hormonal contraceptive pills, exercise, bending over, high altitude and excessive heat (10). Our guide to migraine triggers explains how to tell a real trigger from a coincidence.
Who gets retinal migraine?
Because it is so rare, the numbers come from small case series rather than population studies. In one series of 46 patients (Grosberg and colleagues, 2006), symptoms started between ages 7 and 54, with an average onset in the early-to-mid 20s; 61% were women, and 30% had a family history of migraine (2). A 2021 review of reports published from 2006 to 2020 found only 12 cases that met the strict ICHD-3 criteria; their average age was 39.5, and 10 of the 12 were women (2).
Two things follow. First, many people told "you have retinal migraine" may in fact have a both-eyes aura or another cause. Second, a first episode of one-eye vision loss later in life raises the stakes: the ICHD-3 notes that when any aura starts for the first time after age 40, other causes — particularly transient ischemic attacks — should be ruled out (11). Mayo Clinic also lists visual changes that begin after age 50 as a reason to see a professional right away (7).
Retinal migraine without headache
People often search for this, and the honest answer is: it is uncertain. The ICHD-3 notes that cases without headache have been reported, but in those cases migraine "cannot be ascertained" as the underlying cause (1). In other words, one-eye vision loss without any headache is even more important to investigate, because the migraine explanation is weaker and other causes become more likely.
Can retinal migraine cause permanent vision loss?
Most episodes resolve completely; that is part of the definition (1). But the classification also notes that permanent one-eye vision loss associated with migraine has been described (1). In the Grosberg series of 46 patients, 21 (46%) developed permanent vision loss (2).
That figure needs context. It comes from a small group of published cases, which tend to include the more severe ones, and the cases were collected before the current strict criteria. It is not your personal risk. What it does show is why one-eye symptoms deserve a full eye and vascular work-up and a follow-up plan, rather than a quick "it's just a migraine."
Retinal migraine treatment
There are no clinical trials of drugs for retinal migraine (9); treatment advice rests on case reports and experience. What the sources say:
Infrequent episodes may not need treatment. The NHS says treatment is "not usually needed if you do not have them very often" (4).
Frequent episodes. A GP may suggest avoiding triggers, painkillers, anti-sickness medicines, preventive medicines or acupuncture, and a neurologist may get involved if these do not help (4).
Preventive medicines in reports. Cleveland Clinic names calcium channel blockers such as nifedipine and verapamil as go-to preventive medicines, with aspirin and antiepileptic drugs as other options (10). The Vision review mentions propranolol, imipramine, nortriptyline and verapamil in case reports, and notes that some authors advise against beta-blockers because of a theoretical risk of narrowing small arteries (2).
During an episode. Stop demanding visual tasks, rest in a dim room and, if you are driving, pull over until your vision returns (9).
Which acute migraine medicines are suitable for you — including triptans — depends on your heart and blood vessel health, your other medicines and what your doctor finds. Do not start, stop or change a medicine based on an article; ask your doctor. For an overview of migraine medicines in general, see migraine treatment.
Steps that help whatever the diagnosis
Know your red flags and act on them every time, even if you have been diagnosed before.
Do not smoke, and get your blood pressure checked — both are listed triggers and both matter for blood vessels (4).
Ask about your contraception if you have aura: the NHS lists migraines with aura among conditions that may make the combined pill unsuitable (12).
Keep a symptom diary with the eye, the duration and what you saw.
Keep regular sleep, meals and fluids, since dehydration and low blood sugar are listed triggers (4).
Living with retinal migraine: the questions people ask next
Is a retinal migraine a stroke?
No — but it can look like one, and a doctor cannot tell the difference over the phone. A blocked retinal artery is a type of stroke that also causes sudden one-eye vision loss (3). That is why every new episode is treated as an emergency until proven otherwise.
Can stress cause retinal migraine?
Stress is one of the possible triggers the NHS lists (4). A trigger is a last push, not the cause, and it does not change what to do when your vision goes: get checked.
Is retinal migraine genetic?
Migraine in general runs in families. In the Grosberg series, 30% of people with retinal migraine had a family history of migraine (2).
Can I drive with retinal migraine?
Never drive during an episode; pull over safely and wait until your vision is fully back (9). If episodes come without warning or keep recurring, ask your doctor about driving.
Should I see an eye doctor or a neurologist?
Usually both. Eye causes are checked by an ophthalmologist, and migraine and stroke risk by a neurologist or your primary care doctor; a joint approach is recommended (9). In an emergency, go to the emergency department first.
What does a retinal migraine look like?
Most often like a dimming, a missing patch or a blackout in one eye, sometimes with flickering lights (2, 4). From the outside, the eye looks normal.
Before you blame yourself
When vision fails in one eye, the mind goes to "I ignored my body" or "I made it worse by waiting." Before you blame yourself, look at your data — and at the facts. Retinal migraine is rare, the cause is not known, and even specialists need tests to tell it apart from other conditions. What you can control is small and concrete: act on red flags every time, and choose one lever for the next 2 weeks — for example, regular meals and water through the day, or a fixed bedtime. Write down any episode with the eye, the time and what came before. That record is worth more to your doctor than any amount of guilt.
When to see a doctor
Get emergency help for sudden vision loss in one eye, sudden blurred or double vision, weakness on one side of the body or face, problems speaking or remembering, confusion, a seizure or a sudden, extremely painful headache (3, 4, 5). Do not drive yourself.
Get urgent same-day advice for a first-ever blind spot or vision problem (4), for new floaters, flashes or a curtain over your vision (6), for an aura lasting longer than 1 hour, for an attack lasting longer than 72 hours, or if you are pregnant or have just had a baby (5).
See your doctor if episodes are getting worse, more frequent or different from your usual pattern (4).
How to bring this up with your doctor
Retinal migraine is rare, so you may meet doctors who have rarely seen it. Clear information helps:
Say "one eye" and which eye. For example: "I lost the lower half of vision in my left eye for 20 minutes, and covering my right eye did not change it."
Bring a drawing of what you saw and the exact times. The diagnostic criteria accept a patient's drawing as part of the evidence (1).
Ask by name: "Have other causes of temporary one-eye vision loss been ruled out?" "Do I need an eye exam with visual fields and OCT, or a carotid ultrasound?" "Is my contraception still right for me?" "Which acute migraine medicines are safe for me?"
Mention your health background: smoking, high blood pressure, heart or blood vessel problems, a family history of stroke, any new headache or scalp pain, the contraception you use, or pregnancy.
If you feel dismissed, say: "I understand it may be a migraine, but I would like other causes ruled out. Can you refer me to an ophthalmologist or a neurologist?"
A simple diary makes this easier. Our migraine headache diary guide shows what to record, and is it a headache or a migraine helps you describe the headache part.
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How Welltory helps — and what it cannot do
What it cannot do. Welltory is a general wellness product, not a medical device. It does not examine your eyes, your retina or your blood vessels, it cannot tell a retinal migraine from an eye stroke, it does not diagnose migraine and it cannot predict an attack. Our review of whether a smartwatch can predict a migraine explains why. If you lose vision in one eye, call for help — do not measure anything first.
What it can do is help you keep track of the everyday context around your episodes, measured the same way against your own baseline:
A quick heart rate and HRV reading with your phone camera. It is a spot reading, not continuous monitoring; follow the measurement guide and the tips for accurate HRV readings.
Sleep, resting heart rate and activity from your watch or ring. You can connect Apple Health on iPhone, or Health Connect and Samsung Health on Android, plus sources such as Oura and Fitbit.
Tag what happened. If you use an iPhone with an Apple Watch or Oura ring, the Today screen flags stress stretches and asks "What happened?" — you can tag "vision, left eye," "short night" or "skipped lunch." On iOS, My Patterns groups those tags so you can look back at what came before; some sections need a paid plan.
A log for your doctor. You can export your data as a CSV file from the web app and bring it to your appointment alongside your symptom notes. Patterns are something to discuss with your doctor, not proof of a cause.
Working this out with other women. Welltory Migraine Lab is a paid, moderated online community for women aged 18 to 65 living with migraine; you do not need a diagnosis to join. It opens on December 1, 2026; you can book your place now, and your paid period starts on the opening day. Members get a personal strategy built on their own data, a community of women with similar symptoms, and a medical board that explains what is happening in the body. It is education and peer support, not medical care, and it does not replace your clinician. Join Migraine Lab or read what Migraine Lab is, who it is for and what it costs.
How we made it
We based this article on the International Classification of Headache Disorders (ICHD-3), NHS guidance on retinal migraine, migraine, detached retina and the combined pill, Mayo Clinic and Cleveland Clinic patient guidance, an American Heart Association statement on eye strokes, and peer-reviewed reviews of retinal migraine in Vision (2021) and the Romanian Journal of Ophthalmology (2020), plus the REFORM study in The Journal of Headache and Pain. Every number was checked against the source we cite on November 10, 2026. Search questions came from what people in the United States most often ask about retinal migraine and vision loss in one eye. For the product section, we checked every function against the Welltory Help Center on November 10, 2026.
Made with AI tools, then edited and fact-checked by the Welltory team. See our Editorial & AI policy.
Jane Smorodnikova, co-founder of Welltory, built the methodology behind how we read physiological data.
Written by Tatsiana Yashyna.
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This article is for educational purposes only and is not medical advice. Sudden vision loss in one eye, blurred or double vision, weakness on one side of the body or face, or trouble speaking needs emergency care. This guide is published by Welltory, which makes one of the apps mentioned. Welltory is a general wellness product: it helps you track and understand your data and does not diagnose or treat any condition. Sources were retrieved on November 10, 2026.
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Written by Jane Smorodnikova
The founder and CEO of Welltory. A recognized tech leader with two Master's degrees and experience at MIT, she has scaled Welltory to over 17 million users.
Written by Tatsiana Yashyna
Deputy COO at Welltory. With a background in medicine and years of working with health data, she translates research and real physiological signals — sleep, stress, heart rate, and hormones — into clear, evidence-based explanations that help people understand what their bodies are telling them.
References
- Headache Classification Committee of the International Headache Society. ICHD-3 — 1.2.4 Retinal migraine. https://ichd-3.org/1-migraine/1-2-migraine-with-aura/1-2-4-retinal-migraine/
- Chong YJ, Mollan SP, Logeswaran A, Sinclair AB, Wakerley BR. Current perspective on retinal migraine. Vision 2021;5(3):38. https://pmc.ncbi.nlm.nih.gov/articles/PMC8396291
- American Heart Association — Stroke affecting the eye requires immediate treatment, can signal future vascular events (on Mac Grory B, et al. Management of central retinal artery occlusion. Stroke 2021, doi:10.1161/STR.0000000000000366). https://newsroom.heart.org/news/stroke-affecting-the-eye-requires-immediate-treatment-can-signal-future-vascular-events
- NHS — Retinal migraine. https://www.nhs.uk/conditions/retinal-migraine/
- NHS — Migraine. https://www.nhs.uk/conditions/migraine/
- NHS — Detached retina (retinal detachment). https://www.nhs.uk/conditions/detached-retina-retinal-detachment/
- Mayo Clinic — Ocular migraine: When to seek help. https://www.mayoclinic.org/diseases-conditions/migraine-headache/expert-answers/ocular-migraine/faq-20058113
- Thomsen AV, Ashina H, Al-Khazali HM, et al. Clinical features of migraine with aura: a REFORM study. The Journal of Headache and Pain 2024;25:22. https://link.springer.com/article/10.1186/s10194-024-01718-1
- Istrate BM, Vîlciu C, Răgan C. Retinal migraine. Romanian Journal of Ophthalmology 2020;64(2):96–99. https://pmc.ncbi.nlm.nih.gov/articles/PMC7339700
- Cleveland Clinic — Ocular migraine. https://my.clevelandclinic.org/health/diseases/24961-ocular-migraine
- ICHD-3 — 1.2.1.2 Typical aura without headache. https://ichd-3.org/1-migraine/1-2-migraine-with-aura/1-2-1-migraine-with-typical-aura/1-2-1-2-typical-aura-without-headache/
- NHS — Combined pill: who can take it. https://www.nhs.uk/contraception/methods-of-contraception/combined-pill/who-can-take-it/
- Welltory Help Center — Taking measurements with your smartphone camera. https://help.welltory.com/en/articles/4412277-taking-measurements-with-your-smartphone-camera
- Welltory Help Center — How to take accurate heart rate variability measurements. https://help.welltory.com/en/articles/3361520-how-to-take-accurate-heart-rate-variability-measurements
- Welltory Help Center — Data sources and how to connect them. https://help.welltory.com/en/articles/11130907-data-sources-and-how-to-connect-them
- Welltory Help Center — My Patterns (iOS). https://help.welltory.com/en/articles/16012012-my-patterns-ios
- Welltory Help Center — How to export data from Welltory. https://help.welltory.com/en/articles/3368391-how-to-export-data-from-welltory