When you think about glaucoma care, eye drops, laser treatments, or surgery probably come to mind. But new research suggests that something much simpler—how you sleep—may also affect eye pressure.
A study published in January 2026 in the British Journal of Ophthalmology looked at how sleeping position influences eye pressure in people with glaucoma. The findings suggest that sleeping with your head raised high on pillows could increase eye pressure during the night.
Why Eye Pressure Matters
Glaucoma is a disease that damages the optic nerve, often because of increased pressure inside the eye, called intraocular pressure (IOP). Even small changes in IOP, especially over many hours, can play a role in disease progression. That’s why doctors pay close attention to pressure control—day and night.
What the Study Found
Researchers studied 144 patients with glaucoma. They measured eye pressure in two different positions:
- Flat on the back (supine position)
- Head elevated 25–35 degrees using two pillows
They found that when patients slept with their heads raised high on pillows:
- Eye pressure was higher
- Eye pressure fluctuated more over 24 hours
- Blood flow pressure to the eye (ocular perfusion pressure) was lower
These changes are important because higher and more variable eye pressure can increase the risk of glaucoma damage over time.
The study also found that younger patients and those with primary open-angle glaucoma had larger pressure changes related to sleep position. People with thicker corneas also showed greater pressure fluctuations.
What’s Going On in the Neck?
To better understand why this happens, the researchers also looked at blood flow in the neck veins of healthy volunteers. When the head was elevated on pillows, the veins that drain blood from the head—the jugular veins—became more compressed. This compression slowed normal blood drainage and increased pressure in the veins, which can raise pressure inside the eyes.
In simple terms: when the neck veins are squeezed, blood backs up, and eye pressure can go up.
What This Means for Patients With Glaucoma
This study suggests that sleeping with your head too elevated may not be ideal for people with glaucoma, especially if you already have trouble controlling eye pressure. While many people raise their heads to help with snoring, reflux, or breathing problems, this position could unintentionally raise eye pressure during sleep.
Practical Takeaways
- If you have glaucoma, avoid stacking multiple pillows under your head unless your doctor recommends it for another medical reason.
- Try to keep your head and neck in a more neutral, comfortable position at night.
- Do not change your medications or sleep habits without discussing it with your eye doctor first.
A Simple Habit That May Help
The good news is that sleep position is something you can easily adjust. While it won’t replace glaucoma treatment, paying attention to nighttime posture may be a helpful extra step in protecting your vision.
If you have questions about how sleep, posture, or lifestyle habits affect your glaucoma, talk with your eye care provider. Small changes can sometimes make a meaningful difference over time.