Sleep Apnea and Dry Eyes: Can Poor Sleep Affect Eye Health?

Medically reviewed by Allen J. Blaivas, D.O.

Written by Lauren Sherman, M.S.

Posted on August 25, 2026

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Key Takeaways

People with sleep apnea may be more likely to experience dry eyes, and the connection between the two conditions may involve low oxygen levels, inflammation, and changes in the glands that help produce healthy tears.

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Waking with gritty, burning eyes can feel like one more problem piled on. The connection between sleep apnea and dry eyes may not seem obvious at first. But repeated drops in oxygen, inflammation, loose eyelids, and continuous positive airway pressure (CPAP) leaks may all affect the eye surface.

Research suggests that people with sleep apnea are more likely to have dry eye disease, and some dry eye measures may be worse with more severe sleep apnea. Understanding the possible causes can help you spot problems early, improve CPAP comfort, and work with your sleep and eye care teams to protect your vision.

🗳️ Are you impacted by sleep apnea and dry eyes?

Yes

How Are Sleep Apnea and Dry Eyes Connected?

Dry eye disease develops when the eyes don’t make enough or the right type of tears, or when tears evaporate too quickly. Sleep apnea may contribute to both problems through low oxygen, inflammation, and changes in the glands that support healthy tears.

Lower Oxygen Can Drive Inflammation

During obstructive breathing events, oxygen levels can repeatedly fall and then recover. This pattern is called intermittent hypoxia. This pattern can increase oxidative stress, in which unstable molecules place extra strain on cells, and trigger inflammation throughout the body.

Sleep apnea is associated with higher levels of inflammatory signaling proteins called cytokines, including interleukin-6 (IL-6) and tumor necrosis factor-alpha (TNF-alpha). Researchers think this inflammation may affect the lacrimal glands, which make the watery part of tears, and the meibomian glands, which make protective oils along the eyelids. Problems in these glands may reduce tear production and increase evaporation.

Tears Can Become Scarcer and Less Stable

Healthy tears form a thin coating called the tear film. Its water, oil, and mucus layers keep the eye surface smooth, moist, and protected. When lacrimal glands make less fluid or meibomian glands release too little oil, the tear film can break apart too quickly, leading to dry eyes.

Research shows that people with sleep apnea have lower tear production, shorter tear break-up time, more meibomian gland loss, and more dry eye symptoms than people without sleep apnea. These changes were generally more noticeable with more severe sleep apnea.

What Is Floppy Eyelid Syndrome?

Floppy eyelid syndrome (FES) is an eyelid condition strongly associated with obstructive sleep apnea (OSA). One proposed explanation is that low oxygen from OSA may increase enzymes that break down elastin, which can make eyelid tissue less elastic.

The eyelids become unusually loose and may turn outward during sleep. When the eyelid doesn’t rest firmly against the eye, oil from the meibomian glands may not mix into tears properly. If the eyelid doesn’t fully seal closed during sleep, the eye surface may be exposed to air, bedding, and friction.

People with FES may wake with symptoms such as:

Irritation
Redness
Mucus discharge
Burning
Watering
Swelling

People may also experience light sensitivity and the feeling that something is in their eye.

Treatment may include taping the eyelids shut, wearing eye shields, and using artificial eye lubricants before bed. Side or face-down sleeping can press a loose eyelid against the pillow, causing it to turn outward and expose the eye surface. FES is often more pronounced on the side a person usually sleeps on.

Can CPAP Help or Worsen Dry Eyes?

CPAP treats sleep apnea by keeping the airway open, but its effect on dry eyes can vary. Mask fit, air leakage, sleep position, treatment length, and the health of your eyelids and tear glands may all matter.

When Might CPAP Help?

Some research suggests that longer-term CPAP use may improve some dry eye measures and eye irritation in some people.

Treating sleep apnea may also reduce some effects of repeated low oxygen, although more research is needed to show how much that improves dry eye disease.

When Might CPAP Make Symptoms Worse?

An ill-fitting mask can leak air upward toward the eyes. Airflow from a leaking mask can leave the eyes dry or teary. In one retrospective study, CPAP use was associated with about four times the odds of dry eye disease after researchers adjusted for OSA severity.

Mask leaks are mentioned by several MySleepApneaTeam members. One member asked the group, “What can you do when you have obstructive sleep apnea and you’re claustrophobic and air from the different masks goes into your eyes?” Since they had already tried multiple masks, it was recommended they speak with their doctor and explore CPAP alternatives.

CPAP Alternatives

CPAP is a common and effective treatment for OSA. When CPAP isn’t tolerated, there are alternative treatment options:

Oral appliances — Custom-fitted mouthpieces move the lower jaw or tongue forward to help keep the airway open during sleep. They’re often used for mild to moderate sleep apnea.
Myofunctional therapy — Exercises that strengthen the tongue and other upper-airway muscles may help reduce airway narrowing during sleep. They’re often used along with other treatments.
Weight management — For people with obesity, losing weight may reduce the severity of sleep apnea by decreasing pressure and tissue around the upper airway. Tirzepatide (Zepbound) is approved by the U.S. Food and Drug Administration (FDA) to treat moderate to severe OSA in adults with obesity, along with a reduced-calorie diet and increased physical activity.
Hypoglossal nerve stimulation — An implanted device stimulates the nerve that controls the tongue, helping move the tongue forward and keep the airway open. It may be an option for some people with moderate to severe sleep apnea who can’t use CPAP.
Surgery — Procedures may remove or reposition tissue, correct certain structural problems, or move the jaw forward to create more room in the airway. Surgery is generally considered when other treatments haven’t worked or aren’t appropriate.

Always talk with your sleep specialist before changing or stopping CPAP.

How Can You Protect Your Eye Health?

A few practical steps may ease symptoms while your care team looks for the cause. Dry eye treatment should match whether the main issue is low tear production, fast evaporation, eyelid looseness, inflammation, or CPAP airflow.

Steps that may help protect your eye health include:

Using lubricating eye drops — Over-the-counter artificial tears may help with dry eye symptoms. If you use drops often, an ophthalmologist can recommend an appropriate type, and preservative-free drops may be preferred for frequent use.
Checking for mask leaks — Put on the mask while lying in your usual sleep position. Notice whether air moves toward your eyes, then ask your care team or CPAP supplier for a fit check.
Keeping your care team informed — Report morning redness, burning, tearing, discharge, or changes that began after starting CPAP. Don’t simply overtighten the straps, which may cause pressure without solving the leak.
Scheduling eye exams — Tell the eye doctor if you have sleep apnea and use CPAP. Eye-surface evaluation is especially important with severe sleep apnea or ongoing symptoms.
Following the treatment plan — Use prescribed drops, ointments, warm compresses, eyelid care, or other treatments as directed. Ask an eye care professional before taping the eyelids or using a nighttime eye shield.

When Should You See a Doctor?

Talk with a doctor or eye care professional if dryness or irritation continues, keeps returning, or interferes with CPAP use. Make an appointment for new or worsening redness, discharge, light sensitivity, eye pain, frequent blurred vision, or a feeling that something is stuck in the eye. They can determine whether FES, meibomian gland dysfunction, CPAP leakage, or another condition is contributing to your symptoms.

Most dry eye symptoms don’t require emergency care. However, some eye symptoms can signal a more serious problem that needs prompt treatment.

Seek emergency medical care for severe eye pain or eye pain with any of the following:

Headache, fever, or strong sensitivity to light
A sudden change in vision
Nausea or vomiting
Sudden halos around lights
Swelling in or around the eye
Trouble moving the eye or keeping it open
Blood or pus coming from the eye

These symptoms may have causes unrelated to dry eye, sleep apnea, or CPAP use. Getting prompt medical attention can help identify the cause and protect your eye health.