Retina and macula · AM
Migraine and the eye
Scintillating scotoma · retinal migraine · cluster · GCA · IIH
Last reviewed: 2026-10-06 · 潘家健醫生
Key points
- Migraine can have visual aura; eye care separates typical reversible aura from sight- or life-threatening emergencies.
- Sudden monocular blur or vision loss: do not assume migraine first — A&E now.
- New ptosis and double vision with a dilated pupil: A&E now (exclude posterior communicating aneurysm, etc.).
- Age ≥50 with visual red flags plus new headache / jaw claudication: do not miss giant-cell arteritis (see that page).
What it is
Migraine is a neurological condition; some people have visual aura. Ophthalmology’s job is to separate typical reversible binocular aura from blinding or life-threatening vascular emergencies. This page is education — not a neurology or ophthalmology visit, and not booking.
Visual aura (scintillating scotoma)
Typically a zigzag fortification spectrum that expands, then a temporary scotoma; usually binocular (still in both fields with one eye closed), lasting about 20–60 minutes, often followed by headache, photophobia or nausea. Aura is usually reversible, but a first episode, a change in pattern, or other neurological signs still needs a doctor.
Versus TIA / retinal artery occlusion (education table)
| Feature | Migraine visual aura | Vascular events to exclude (TIA / CRAO and similar) |
|---|---|---|
| Field | Often binocular, positive expanding scintillation then scotoma | Often monocular or a fixed black patch; CRAO is sudden severe vision loss |
| Timing | Often 20–60 minutes, builds then fades | Sudden; arterial occlusion is a minutes-scale emergency |
| Company | Later migraine or personal/family migraine history | Carotid, rhythm or blood-pressure disease; stroke signs |
Visual snow is a different, ongoing dotted disturbance — not the same as classic scintillating aura, and not a self-label from this page.
Retinal migraine
A rare diagnosis of temporary monocular vision loss only after embolism, vasospasm and other fundus emergencies are excluded. Sudden monocular blur or sudden vision drop: do not treat it as migraine first — go to A&E now (aligned with this site’s urgent page).
A first or worst headache that climbs to extreme pain within minutes (thunderclap): go to A&E now — do not tough it out as migraine. Stroke signs, whether or not you call them an “aura”: go to A&E now.
Cluster headache (education only)
Severe one-sided orbital pain attacks with tearing, nasal stuffiness or a red eye, in clusters. Care is neurology/headache specialty; this page only helps recognition — no drug or inhaler pitch.
Giant-cell arteritis (GCA) — a blinding emergency not to miss
- More often in older adults; new headache, jaw claudication, scalp tenderness, shoulder stiffness
- Sudden vision drop or sudden blindness: go to A&E now — permanent blindness is possible
- Same urgency when linked to retinal artery occlusion or ischaemic optic neuropathy
Fuller public education (systemic clues, work-up concepts, treatment classes) is on the giant-cell arteritis page. This page keeps only the must-not-miss emergency points.
Idiopathic intracranial hypertension (IIH)
May bring headache, pulsatile tinnitus and papilloedema; vision can worsen gradually or faster. Needs specialty assessment — not a DIY diagnosis.
Aligned with the urgent page
- Sudden vision drop or sudden blindness, or a field curtain: go to A&E now
- Severe eye pain with headache and vomiting: go to A&E now (also exclude acute angle closure)
- New double vision with a dilated pupil, or suspected GCA with sudden vision loss: go to A&E now
This is general medical information, not a diagnosis, and cannot replace an in-person consultation with a registered ophthalmologist, refraction, or a dilated fundus exam. It is not advice to use any medicine or undergo any procedure. Medicines (including off-label use), laser or surgery must be decided by a registered doctor after examination, according to indications and Hong Kong registration. Figures from the literature are published averages, not any clinic’s results. This site does not book, prescribe or refer. Do not change treatment on your own.