Sleeping with Eyes Open: What Does It Mean and Is It Harmful?

Sleeping with eyes open means that the eyelids do not fully close during sleep. This condition can negatively affect sleep quality, increase the risk of eye diseases, and gradually weaken overall health.

What Is the Phenomenon of Sleeping with Eyes Open?

Sleeping with eyes open is medically termed Nocturnal Lagophthalmos. It refers to a condition where a person sleeps with their eyes partially or fully open, even during deep sleep. This is not a rare or strange occurrence—it is actually a relatively common eye disorder.

Causes of Sleeping with Eyes Open

Since this is an eye-related condition, the causes are often linked to eye structure or surrounding areas.

1. Muscle or Nerve Problems Around the Eyelids

Paralysis or weakness of the muscles responsible for closing the eyelids is one of the main causes. This may result from:

• Tumors pressing on facial nerves

• Surgical procedures near facial nerves

• Eye or facial injuries

• Moebius syndrome

• Guillain-Barré syndrome

Other illnesses such as chickenpox, mumps, diphtheria, or botulism poisoning can also cause muscle weakness or nerve paralysis, including in the eyelids and facial area.

2. Physical Damage to the Eyelids

Injuries like eyelid surgery, facial burns, or trauma can affect eyelid movement, making it difficult to close the eyes completely.

3. Protruding Eyes Due to Hyperthyroidism

People with thyroid eye disease may have bulging eyes, making it hard for the eyelids to close.

4. Sleep Disorders or Facial Muscle Atrophy

Certain sleep disorders or weakened facial muscles may also lead to sleeping with the eyes open.

5. Genetic Factors

In some families, nocturnal lagophthalmos can be hereditary.

6. Thick Eyelashes

A few rare cases involve eyelashes that are too thick or long, preventing the eyelids from fully closing.

Is Sleeping with Eyes Open Harmful?

Yes, this condition can lead to serious eye complications and even affect overall health. In severe cases, it can cause vision loss.

When we close or blink our eyes, a thin layer of tears coats the cornea and conjunctiva, keeping them moist and healthy. However, people who sleep with their eyes open lack this natural lubrication, leading to dryness, clouding, or corneal ulcers—which may eventually impair vision.

Additionally, partially open eyes allow dust and bacteria to enter easily, increasing the risk of infections such as conjunctivitis or keratitis. There is also a higher chance of corneal scratches or thickening of the outer layer due to excessive exposure.

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How to Treat Sleeping with Eyes Open

Mild cases:

• Wear moisture goggles at night

• Use a humidifier in the bedroom

• Apply lubricating eye drops or artificial tears

• Use prescribed eye ointments to prevent dryness or scratches

Severe cases:

• Surgery may be required to correct eyelid function or implant weights to help the eyelid close properly.

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Conclusion

Sleeping with eyes open is not an uncommon eye condition. If detected early, it can be managed easily with eye drops and proper care. However, if left untreated, it may affect your vision. Therefore, if you notice that you sleep with your eyes partially open, consult an eye specialist promptly to determine the right treatment plan before the condition worsens.