How to Tell if You Have Nocturnal Lagophthalmos (And What to Do About It)
If you often wake up with dry or burning eyes, you may be sleeping with your eyes open. Learn the signs of nocturnal lagophthalmos and how to protect your eyes naturally.
How to Tell if You Have Nocturnal Lagophthalmos (And What to Do About It)
If you often wake up with dry, irritated, or burning eyes, you may be sleeping with your eyes partly open — a condition known as nocturnal lagophthalmos. It’s more common than people realize, and because it happens while you sleep, it often goes unnoticed for years. In this post, you’ll learn the key symptoms, how to tell if you have it, what causes it, and the most effective ways to protect your eyes overnight. For a full guide on nighttime dryness, see The Complete Guide to Dry Eyes.
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1. What Is Nocturnal Lagophthalmos?
Nocturnal lagophthalmos occurs when your eyelids fail to close completely during sleep. Even the smallest gap allows tears to evaporate, leaving your corneas exposed and dehydrated. Because your eyes depend on a closed-lid environment to retain moisture and recover, this exposure can cause redness, irritation, and in severe cases, corneal damage over time.
This condition is often temporary and mild, but in some cases, it’s linked to nerve or muscle issues around the eyelids. Regardless of severity, treating it early is important to prevent long-term dryness and discomfort.
2. Common Symptoms: Are You Sleeping with Your Eyes Open?
If you suspect you might be sleeping with your eyes open, look for these telltale symptoms:
- Dryness or irritation immediately after waking
- Redness that improves later in the day
- Burning, stinging, or “gritty” sensations in the morning
- Light sensitivity (especially early in the day)
- Blurry vision that clears after blinking
- Watery eyes — a common reaction to dryness
- A partner or family member noticing your eyes slightly open while you sleep
Because the symptoms overlap with general dry eye disease, nocturnal lagophthalmos is often overlooked until someone else notices the physical eyelid opening.
3. What Causes Nocturnal Lagophthalmos?
Several factors can contribute to incomplete eyelid closure during sleep:
- Facial nerve weakness: From mild palsy, Bell’s palsy, or congenital nerve damage.
- Post-surgical changes: After eyelid, facial, or LASIK surgery, tension or stiffness can reduce closure.
- Natural aging: Muscle tone around the eyelids decreases with age.
- Thyroid eye disease: Can cause protrusion of the eyes, preventing full closure.
- Genetics: Some people are simply predisposed to sleeping with their eyes slightly open.
Even if none of these apply, mild lagophthalmos can still develop due to sleeping position, eyelid anatomy, or chronic dryness.
4. How to Tell if You Have It
There are a few simple ways to confirm whether you have nocturnal lagophthalmos:
- Ask someone to observe: Have a partner or family member check your eyelids 15–30 minutes after you fall asleep. Even a small slit between lids can indicate exposure.
- Mirror test: Before bed, gently close your eyes and look in a mirror. If you can still see a faint glint of the eye or lashes from above, your lids may not fully meet.
- Morning light sensitivity: Difficulty opening your eyes due to burning or glare is a common clue.
- Professional exam: Your eye doctor can perform a slit-lamp exam or use fluorescein dye to check for exposure marks on the cornea.
Because it happens during rest, diagnosis usually relies on both symptoms and outside observation. Once identified, it’s highly manageable with consistent nighttime care.
5. What You Can Do About It
The goal of treatment is to protect the cornea and restore eyelid closure. Common solutions include:
- Gentle eyelid adhesive: Products like EyeOasis Sleeping Tape hold the eyelids closed without irritation, reducing evaporation overnight.
- Lubricating ointments: Thick gels can provide a moisture barrier before sleep.
- Humidifiers: Maintaining humidity between 40–60% reduces tear loss to dry air.
- Sleeping position: Sleeping on your back minimizes downward lid gaps.
- Medical treatment: In severe or nerve-related cases, your doctor may recommend eyelid weights, moisture goggles, or temporary surgical solutions.
Most people find immediate relief when they start sealing their eyelids each night. Within a few days, morning irritation, redness, and blurriness often improve dramatically.
Shop the Solution
Protect your eyes naturally overnight with EyeOasis Sleeping Tape — a gentle, breathable adhesive that helps keep eyelids closed, reduces moisture loss, and prevents morning irritation.
Sources
- American Academy of Ophthalmology. *Exposure Keratopathy: Diagnosis and Management.*
- Harrison W, et al. *Nocturnal Lagophthalmos and Sleep Quality in Dry Eye Disease.* Cornea, 2018.
- Tsubota K, et al. *Sleep and Ocular Surface Hydration.* Ophthalmology, 1995.
- Craig JP, et al. *TFOS DEWS II Report: Tear Film Homeostasis and Dry Eye.* Ocul Surf, 2017.