Do your eyes ever feel dry, scratchy, or struggle to close fully when you blink or sleep? Learn what lagophthalmos is and how to protect your vision.

Have you ever felt like you cannot close your eyes all the way? Maybe a family member or a friend has mentioned that your eyes stay slightly open while you sleep. While some people might brush this off as a minor quirk, it can actually be a sign of a medical condition that needs care.

Doctors call this condition lagophthalmos. It happens when your eyelids cannot close fully to cover your entire eyeball. In this guide, we will break down what causes this issue, the symptoms to look for, and how doctors treat it so you can keep your eyes healthy and comfortable.

What Is Lagophthalmos?

Simply put, lagophthalmos is the inability to close your eyelids all the way. This can affect just one eye or both eyes at the same time. Think about how your eyes blink or close when you sleep. Your eyelids should form a tight seal to keep moisture in and dust out. When they do not close properly, that natural protection is lost.

This condition can happen on its own. It can also happen alongside other eyelid problems, such as a drooping eyelid known as ptosis. Sometimes, lagophthalmos can develop as an unexpected side effect after cosmetic eyelid surgery, known as blepharoplasty, or after a procedure to fix a drooping eyelid.

If your eyelid is only open a tiny sliver, it might not cause major trouble right away. However, if your eyelids fail to close properly over a long period, it can lead to serious eye problems. Imagine your cornea, which is the clear front part of your eye, staying exposed to the air, dust, and wind all day and night. This constant exposure can lead to painful sores, lasting scars, and even loss of vision. That is why taking this condition seriously is so important.

Are There Different Types of Lagophthalmos?

Yes, medical experts break lagophthalmos down into a few main types based on why and when it happens. Let us look at each type in detail.

Nocturnal Lagophthalmos.

With this type, your eyes close normally while you are awake. But when you fall asleep, your eyelids stay partially or fully open. The word lagophthalmos comes from Greek roots that mean hare-like eyes, based on an old belief that hares sleep with their eyes open. Today, scientists know that hares actually close their eyes to sleep. Even so, research shows that up to 20 percent of people leave their eyes open a bit while sleeping. This is called nocturnal lagophthalmos.

Paralytic Lagophthalmos.

Your face has special nerves that control your muscles. When the facial nerve on one or both sides of your face stops working correctly, you cannot move your facial muscles as you normally would. This nerve damage can make it impossible to close your eyes fully. Doctors call this paralytic lagophthalmos.

Mechanical Lagophthalmos.

Sometimes the issue is not a nerve problem. Instead, something physical prevents your eyelid from closing. This is called mechanical lagophthalmos. A subtype of this is cicatricial lagophthalmos, which happens when scars pull on the eyelid skin and keep it from moving down smoothly over the eye.

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What Are the Symptoms of Lagophthalmos?

The main sign is that your eyelids do not shut all the way. But you may notice several other warning signs as well. Check to see if you experience any of these common symptoms:

• Watery eyes or extreme dryness. Some people feel like their eyes are burning or aching.
• A gritty feeling. It may feel like sand or dust is trapped inside your eye all the time.
• Blurry vision. Your sight might come and go or look hazy.
• Red eyes. The whites of your eyes may look pink or bloodshot.
• Sensitivity to light. Bright lights might feel uncomfortable or blinding, a condition called photophobia.
• Corneal ulcers. Open sores can form on the clear surface of your eye if it stays too dry.

If you notice any of these signs on a regular basis, schedule a visit with an eye doctor to get a proper checkup.

What Causes Lagophthalmos?

There are many reasons why this condition can develop. It helps to know that lagophthalmos is not contagious. You cannot catch it from someone else, and you cannot pass it to anyone else.

Most causes fall into two main groups:

1. Damage to your facial nerve.
2. Physical damage or structural changes in your eyelids.

Facial Nerve Damage.

Damage to the facial nerve can happen for several different reasons, including:

• Physical injuries, cuts, or trauma around the face and eyes.
• Bell's palsy, a medical condition that causes sudden weakness in the muscles on one side of the face.
• A stroke or other neurological events.
• Growths or tumors, such as acoustic neuromas.
• Autoimmune disorders, like Guillain-Barre syndrome, where your immune system attacks your nerves.
• Genetic conditions, such as Moebius syndrome.
• Certain viral or bacterial infections.
• Exposure to specific toxins.

Eyelid Damage and Structural Issues.

Your eyelids can also become altered due to injury, aging, or medical conditions:

• Lax eyelid syndrome (LES), where the eyelid tissues become loose and stretchy. A similar condition is floppy eyelid syndrome (FES), where the eyelids turn inside out very easily. Floppy eyelid syndrome is most common in men with a body mass index (BMI) over 25.
• Medical skin conditions, such as Stevens-Johnson syndrome, which can cause severe blisters.
• Chemical burns from household or industrial products.
• Severe sun damage over many years.
• Past eyelid surgeries, such as a ptosis repair or cosmetic blepharoplasty.

How Is Lagophthalmos Diagnosed?

If you have symptoms of lagophthalmos, an eye care provider can perform a few simple tests to find out what is going on. During your visit, the doctor will likely do the following:

• Ask about your medical history, current health conditions, and any medicines you take.
• Ask you to close your eyes normally.
• Check how tightly you can squeeze your eyes shut.
• Measure the distance between your upper and lower eyelids.
• Watch how often you blink and check if your eyelids meet completely when you do.

After these tests, your doctor can tell you if you have lagophthalmos, which type it is, and how severe it may be.

How Is Lagophthalmos Treated?

Treatment for lagophthalmos depends entirely on what is causing it. Your doctor will first try to treat any underlying medical condition. For instance, if an infection is present, they will treat that infection. If a tumor or skin disorder is present, they will address that specific issue.

Doctors use both nonsurgical and surgical methods to manage lagophthalmos.

Nonsurgical Treatments.

• Artificial tears. These lubricating drops help keep your eyes moist throughout the day.
• Nighttime eye ointments. Thicker gels or ointments provide long-lasting moisture while you sleep.
• Special medical tape or eye patches. Taping your eyelids shut gently at night keeps air from drying out your eyes.
• Moisture goggles. These specialized glasses trap humidity around your eyes.
• Small external eyelid weights. Tiny weights taped to the eyelid can help pull it down.

Surgical Treatments.

If your condition is severe or if nonsurgical methods do not give you enough relief, your doctor may suggest surgery.

• Tarsorrhaphy: A procedure where the surgeon temporarily or permanently joins parts of the upper and lower eyelids together to protect the eye.
• Eyelid weight implants: The surgeon places a tiny piece of gold or platinum inside the upper eyelid. Gravity then helps pull the eyelid down when you try to close your eyes. This is very helpful for people with paralytic lagophthalmos.
• Upper eyelid surgeries: These procedures fix the muscles inside the upper eyelid or use skin grafts to restore normal movement.
• Lower eyelid surgeries: These tighten loose or floppy lower eyelids and support the eye structure.
• Facial surgeries: If facial paralysis caused your condition, doctors can perform nerve grafts or reposition soft tissues to help restore balance to your face.

Always talk closely with your eye doctor to decide which treatment option is right for your unique health needs.

Are There Complications or Side Effects from Treatment?

Just like any medical care, treatments for lagophthalmos can sometimes carry risks or side effects. While not everyone experiences them, it helps to be aware of what can happen:

• Scarring around the treatment area.
• Infections.
• Entropion, a condition where the eyelid turns inward so that eyelashes rub against the eyeball.
• Drooping eyelids.
• Issues at skin graft sites.

If you notice any unusual swelling, pain, or changes after starting a treatment, contact your doctor right away.

How Can I Manage Lagophthalmos Symptoms at Home?

You can take simple daily steps to protect your eyes and keep them comfortable:

• Use preservative-free artificial tears as often as your doctor recommends.
• Apply prescribed nighttime ointments or tape your eyelids shut before bed if advised by your doctor.

If you also have facial muscle weakness, everyday tasks like eating or speaking might require extra care and support. Talk with your healthcare team about helpful tips and therapy options.

How Can I Reduce My Risk of Lagophthalmos?

You cannot always prevent lagophthalmos, especially when it stems from a medical event like Bell's palsy. However, you can take steps to protect your eyes from injury:

• Wear protective eyewear when working with tools or playing contact sports.
• Wear sunglasses with UV protection when you are out in bright sunlight.
• Avoid rubbing your eyes unnecessarily.
• Wash your hands thoroughly before touching your face or eyes.

also, if you are planning to get cosmetic eyelid surgery or a ptosis repair, make sure to consult an oculoplastic surgeon. These are specialized eye doctors with advanced training in reconstructive surgeries around the eyes.

What Is the Outlook If I Have Lagophthalmos?

In mild cases, the outlook for lagophthalmos is very positive. When the condition results from temporary issues like Bell's palsy, it often improves on its own as the nerve heals.

However, if your condition is moderate to severe, getting proper medical treatment is essential. Without treatment, ongoing exposure can lead to permanent damage to your vision.

When Should I See a Doctor?

See an eye doctor if you have ongoing symptoms like dry eyes, watery eyes, or a gritty feeling that will not go away. Never ignore any sudden changes in your vision.

If you already have a diagnosis of lagophthalmos and your symptoms get worse or fail to improve with your current treatment, let your doctor know right away.

Sometimes you might not even realize your eyelids are staying open until your eyes start hurting. Since lagophthalmos often ties back to facial nerve issues like Bell's palsy, paying attention to any discomfort is vital. If you notice any lasting eye irritation or vision changes, seek professional medical guidance right away.

References & Sources:
1. Cleveland Clinic. Lagophthalmos: Causes, Symptoms & Treatments. Available online: Cleveland Clinic Health Library.
2. Mayo Clinic. Bell's Palsy and Eye Care. Available online: Mayo Clinic Patient Care.
3. National Health Service (NHS UK). Dry Eyes and Eyelid Disorders. Available online: NHS Health A-Z.
4. National Institutes of Health (NIH / PubMed). Evaluation and Management of Nocturnal and Paralytic Lagophthalmos. PMC Medical Journal Archive.