|
Key Takeaways
|
A glaucoma attack can feel like a sudden migraine in the eye, with pain, redness, and fast blur that gets worse within hours.
The scary part is that this is an angle closure glaucoma emergency, and delay can lead to permanent vision loss.
This emergency guide explains what to do in glaucoma attack, what symptoms mean “go now to the hospital,” causes, and what treatment happens in the hospital.
What Is A Glaucoma Attack?
A “glaucoma attack” means acute angle-closure glaucoma, where the drainage angle inside the eye suddenly closes and eye pressure rises quickly. Glaucoma treatment may be required to manage the condition and reduce the risk of vision loss.
A simple way to picture it: your eye makes a clear fluid all the time, and it needs a drain to leave. In an attack, the “drain” gets blocked, so pressure builds up fast.
Acute primary angle-closure attacks commonly occur due to pupillary block in an eye with anatomically narrow angles. However, angle closure can also occur through other mechanisms. The iris bows forward and blocks drainage, especially when the pupil dilates in dim light or after certain medicines.
Angle Closure Glaucoma Emergency: Who Is At Higher Risk?
This emergency is more common in older adults and in people with narrow angles.
One epidemiology study reported a higher risk in women (relative risk 3.8 vs men) and a higher incidence in older age groups. Example: 58.7 per 100,000/year at age 70+ in that population.
|
Risk factor |
Why does it matter? |
|
Age 50+ |
Narrow angles become more likely as the natural lens thickens with age. |
|
Female sex |
Higher risk seen in population studies. |
|
Hyperopia (plus power) |
Smaller eyes tend to have crowded angles. |
|
Asian ancestry |
Acute primary angle-closure is noted as more common in Asian populations in expert consensus discussions. |
|
Medications that dilate the pupil |
Some cold/flu meds, motion sickness meds, and certain antidepressants can trigger attacks in narrow-angle eyes. |
|
Topiramate (a special case) |
Can cause secondary angle closure (not classic pupillary block), within 2 weeks of starting. |
Symptoms Of A Glaucoma Attack
This is where people lose time, because it can look like a headache or food poisoning. In acute attacks, eye pressure can be very high (50–80 mmHg in clinical references), compared with an average normal range of around 10–21 mmHg.
|
Symptom |
What does it feel like? |
Note |
|
Severe eye pain (one eye) |
Deep ache with a hard, red eye |
Can reflect very high eye pressure. |
|
Blurred/foggy vision |
Sudden haze |
Corneal swelling from pressure. |
|
Coloured halos around lights |
Rings around bulbs/streetlights |
Typical in acute angle closure. |
|
Headache + nausea/vomiting |
Feels like a migraine + stomach upset |
Common in an attack and misread as “gastric.” |
|
Mid-dilated fixed pupil |
Pupil looks larger and doesn’t react well |
Classic exam finding. |
What To Do In A Glaucoma Attack?
This is the “minutes matter” section. These steps are safe and recommended by eye doctors around the world.
|
Step |
What to do? |
Why does it help? |
|
1 |
Treat it as an emergency and go to an ER/eye emergency clinic |
Acute angle closure can cause irreversible damage if not treated promptly. |
|
2 |
Don’t drive yourself if your vision is blurred |
Safety matters before faster care |
|
3 |
Avoid rubbing or patching the eye and seek emergency medical care immediately |
Rubbing can worsen corneal injury; patching delays care. |
|
4 |
Bring a list of medicines you took today (including cold/allergy pills) |
Some drugs can trigger or mimic angle closure; doctors need to know. |
|
5 |
If you wear contact lenses, remove them when you can do it cleanly |
Makes examination and treatment easier. |
What NOT to do?
- Don’t “sleep it off.” The pain fluctuates, but the risk continues without treatment.
- Don’t use random “redness” drops. They won’t fix the blocked drainage angle.
- Don’t take someone else’s glaucoma drops as a shortcut. The right drops depend on the cause (primary vs medication-induced angle closure).
What Treatment Looks Like in a Hospital?
Most people feel calmer once they know what the doctors are trying to do.
Goal 1: Lower eye pressure quickly
Emergency management focuses on rapid IOP lowering using a combination of eye drops and systemic medicines. Clinical emergency guides states using topical agents and systemic medicines as part of an acute angle-closure kit approach.
Hospital medicines include:
- Pressure-lowering drops (for example, beta-blocker type like timolol, and others depending on the case)
- Oral/IV acetazolamide (commonly used to reduce fluid production)
- Sometimes IV mannitol in severe cases (used in emergency protocols)
Goal 2: Open the angle safely
Pilocarpine (a pupil-constricting drop) is used after the pressure has come down, because it works better when IOP is lower. StatPearls notes pilocarpine is administered once IOP is below ~40 mmHg.
Goal 3: Fix the cause so it doesn’t happen again
For acute primary angle closure caused by pupillary block, laser peripheral iridotomy is a standard definitive treatment. Depending on the underlying mechanism and clinical situation, other treatments, including lens extraction, may be required, which creates a small hole in the iris so fluid can bypass the blockage.
AAO guidance also notes the untreated fellow eye can have a 40% to 80% risk of an acute attack, so doctors often treat both eyes (LPI in the other eye) to prevent a future emergency.
Newer AAO PPP guidance states that after initial IOP lowering, management should be followed by LPI, surgical iridectomy, or lens extraction, depending on the case.
Why Are Some “Triggers” Mentioned?
Many people ask, “Why did this happen to me today?” The honest answer is: an eye with a narrow angle can tip into attack when the pupil dilates or the anatomy is crowded.
- Dark environments (pupil dilates)
- Certain cold/allergy or motion sickness medicines (dilation effect)
- Topiramate (secondary mechanism, important to mention to your doctor)
Recovery And Follow-Up After An Attack
Once the emergency is controlled, follow-up is not optional, it’s how you protect long-term vision. The emergency is the “fire,” and follow-up is making sure the wiring is safe so it doesn’t catch fire again. A follow-up checks:
- Eye pressure stability
- Corneal clarity (foggy vision should resolve)
- Optic nerve status and visual fields (baseline and later tracking)
Conclusion
A glaucoma attack is a true angle closure glaucoma emergency, and the safest approach is fast medical care, not home remedies.
The most important thing to remember about what to do in a glaucoma attack is simple: go to emergency eye care immediately, and tell doctors about any new medicines you took.
With prompt pressure-lowering treatment and laser iridotomy, many people recover well and prevent repeat attacks.
FAQs
What to do in a glaucoma attack at home before reaching the hospital?
Getting to emergency eye care immediately is the priority, and you should avoid rubbing or patching the eye while arranging transport to the eye hospital.
Can an angle closure glaucoma attack cause permanent blindness?
Yes, angle closure glaucoma attack can cause permanent blindness if the treatment is delayed, which is why it’s managed as an emergency and treated promptly to lower IOP and open the angle.
How quickly do glaucoma attack symptoms start?
Glaucoma attack symptoms can start suddenly and become severe within hours, and many people notice pain, halos, red eye, and nausea/vomiting early in the episode.
Can a glaucoma attack happen again in the other eye?
Yes, after an attack in one eye, the other eye is at significant risk if not treated, and preventive laser iridotomy is commonly done for the fellow eye.
Which medicines can trigger an acute angle-closure attack?
Medicines that can trigger an acute angle-closure attack include some pupil-dilating medicines, certain cold/allergy, and antidepressants in people with narrow angles.
