Sleeping with Eyes Open in Dogs
When to visit the vet?
Non-urgent see a veterinarian within 2–3 days
ORANGE for a dry cornea, a red/painful eye, eye discharge, missing eyelid closure (lagophthalmos), or neurological abnormalities. RED if a corneal ulcer/perforation is suspected.
Unsure about what’s wrong with your pet? Feel free to use our Symptom Checker for more clarity
Definition
Sleeping with eyes open in dogs refers to the condition in which a dog does not completely close its eyes or keeps them partially open during sleep, which may be normal for some dogs but could also indicate health problems.
Can Occur with the Following Diseases:
Basics and possible causes
Like humans, dogs have different sleep phases, including light sleep and deep sleep. During light sleep, dogs may not fully close their eyes. Some breeds naturally tend to sleep with their eyes partially open, which is often genetic.
A common cause of Sleeping with eyes open is incomplete eyelid closure, known as lagophthalmos. Lagophthalmos can result from anatomical features of certain breeds, neurological issues, or injuries. Brachycephalic breeds are particularly affected, as their skull shape makes it difficult to fully close the eyelids.
Eye conditions such as conjunctivitis or dry eyes (keratoconjunctivitis sicca) can also cause dogs not to close their eyes while sleeping, to minimize irritation. A neurological disorder that affects eyelid closure can also play a role.
Typical accompanying symptoms
- Eye irritation: Redness or inflammatory conditions of the eyes, indicating irritation from incomplete closure.
- Tear flow: Excessive tear flow can be a sign of overcompensation of the eye to avoid dryness.
- Behavioral changes: The dog may appear restless or seem to have trouble sleeping, which could indicate discomfort.
- Light sensitivity: Increased sensitivity to light, as the eyes are not adequately protected.
- Frequent blinking: The dog blinks more often than normal to relieve dryness or irritation.
When to visit the vet?
A visit to the vet is advisable if sleeping with eyes open is accompanied by clear symptoms such as severe redness, Swelling, or discharge. If the dog shows signs of discomfort or Pain, a vet should also be consulted.
For chronic or recurring problems, a thorough examination is required to rule out possible underlying causes such as eye disease or neurological issues.
If sleeping with eyes open occurs in a dog that previously slept normally, this could indicate a new health disorder that should be investigated.
Symptom recognition for animal owners and veterinary diagnostic procedures
Pet owners can recognize the symptom by observing their dog while it sleeps. If the eyes are often not fully closed and accompanying symptoms occur, this should be considered an indicator of a problem.
The vet will perform a comprehensive eye exam to check for signs of irritation, inflammation, or structural abnormalities. This includes tear production tests and a slit-lamp examination to assess the condition of the cornea and eyelids.
In some cases, a neurological examination may be necessary to check the function of the facial nerves, especially if a neurological problem is suspected.
What can pet owners do and professional therapy options
To provide immediate relief, the pet owner can moisturize the dog’s eyes while it sleeps to prevent dryness. Eye drops or artificial tears recommended by the vet can help keep the eyes moist.
It is important to keep the dog’s environment quiet and dark to avoid unnecessary stimuli that could further strain the eyes.
The pet owner should make sure the dog does not scratch or rub its eyes to prevent further irritation or injury. A protective device such as an Elizabethan collar can help prevent this.
In the long term, the pet owner should follow the vet’s advice to treat the underlying cause and prevent lasting damage. Regular check-ups are important to monitor the condition of the dog’s eyes.
Outlook on current research
Veterinary research is increasingly investigating the phenomenon of dogs sleeping with their eyes open. This behavior can be observed in many dogs and raises questions about normal sleep physiology. Researchers are trying to understand whether it is an evolution-based protective mechanism or whether it may be linked to neurological or physiological abnormalities. One hypothesis suggests that sleeping with eyes open could serve as a protective mechanism, allowing the animal to perceive potential threats even while asleep. Further studies are needed to investigate the exact causes and effects of this behavior.
More recent studies are looking at how common this behavior is in different dog breeds and whether genetic factors play a role. There seems to be evidence that certain breeds that historically often served as guard dogs are more likely to sleep with their eyes open. This could indicate a genetic predisposition that developed over the course of evolution to increase these animals’ chances of survival.
Another research area gaining importance is the study of neurological activity in dogs that sleep with their eyes open. Using EEGs (electroencephalograms), scientists are trying to analyze the pattern of brain activity during sleeping with eyes open. Initial results suggest there are differences in sleep stages that could indicate altered neurological processing. This type of research could not only deepen our understanding of dog sleep, but also provide insights into similar phenomena in other animals and even humans.
The role of environmental factors is also being studied to understand whether external influences such as light, noise, or temperature affect sleep behavior. There is some evidence that dogs that sleep in environments with frequent disturbances are more likely to keep their eyes open. This could indicate that external stressors play a role in maintaining this kind of behavior.
A major focus of current research is whether sleeping with eyes open has negative health effects on dogs. While some experts believe it is harmless behavior that causes no physiological damage, others are investigating possible long-term effects such as eye irritation or sleep disturbances. These investigations are important to determine whether and when veterinary interventions are necessary.