Exophthalmos (Protruding Eye) in Dogs
When to visit the vet?
Urgent see a veterinarian within 24 hours
RED FLAG in case of proptosis/trauma, acute deterioration of vision, severe pain, fever with severe general malaise, or suspicion of orbital compartment syndrome/rapidly progressive swelling.
Unsure about what’s wrong with your pet? Feel free to use our Symptom Checker for more clarity
Definition
Exophthalmos is a condition in which a dog’s eyeball appears enlarged and protrudes from the orbital cavity. This can occur on one or both sides and often indicates an underlying condition that requires an immediate veterinary examination.
Can Occur with the Following Diseases:
- Salivary Gland Adenocarcinoma (Salivary Gland Cancer)
- Congenital Glaucoma (Congenital Elevated Intraocular Pressure)
- Nasal Chondrosarcoma (Nasal Cancer)
- Eosinophilic Myositis (Masticatory Muscle Inflammation)
- Glaucoma (Intraocular Pressure is Increased)
- Nasal Adenocarcinoma (Nose Cancer in Dogs)
- Squamous cell carcinoma of the nasal cavity (nasal and paranasal sinus cancer originating from skin or mucous membrane cells)
- Retrobulbar Abscess (Pus Collection behind the Eyeball)
- Sialadenitis (Salivary Gland Inflammation)
- Plattenepithelkarzinom der Schleimhaut des Zahnfleisches (Mundkrebs)
- Aspergillosis (Fungal Infection of the Respiratory Tract Caused by Molds of the Genus Aspergillus)
- Craniomandibular Osteopathy (Enlargement of the Jawbone)
Basics and possible causes
Exophthalmos in dogs can be triggered by a variety of causes, all of which lead to the eyeball being excessively prominent. The most common causes include inflammatory conditions, infection, tumors, or traumas. Each of these causes can affect the space behind the eyeball in such a way that the eyeball is pushed forward.
Inflammatory conditions and infections of the surrounding tissues or structures, such as the lacrimal gland or eye muscles, can lead to swelling that pushes the eyeball forward. Such inflammation can be caused by bacterial, viral, or parasitic infections.
Tumors growing behind the eyeball or in the surrounding area also take up space and can push the eyeball outward. These tumors can be benign or malignant and require careful diagnosis and treatment.
Another common reason for exophthalmos is a trauma that can lead to bleeding or swelling behind the eyeball. This often occurs after an accident or injury.
Typical accompanying symptoms
- Eye redness: A protruding eye is often accompanied by conjunctival hyperemia, which indicates irritation or inflammation.
- Eye swelling: In addition to protruding, the eye itself or the surrounding tissues may appear swollen.
- Pain: The dog may show signs of pain, such as closing the eye, rubbing with its paw, or general restlessness.
- Visual disturbances: An affected dog may have difficulty seeing or grabbing objects, indicating impaired vision.
- Behavioral changes: Due to pain or discomfort, the dog may react nervously or aggressively.
- Discharge: A protruding eye can be associated with a clear or purulent discharge, which may indicate an infection.
When to see a vet?
A visit to the veterinarian is urgently required if a dog’s eyeball has protruded. Since exophthalmos is often a symptom of a serious illness, delaying treatment can lead to permanent damage to the eye or even loss of vision.
An immediate vet visit is particularly important if the dog shows signs of pain, such as whimpering, refusing to eat, or aggression when the eye is touched. Even if the dog suddenly loses its orientation or behaves unusually, it should be considered an emergency.
If the exophthalmos occurs after an accident or injury, an immediate veterinary examination is necessary to rule out internal damage and ensure the best possible care for the eye.
Symptom recognition for the pet owner and veterinary diagnostic procedure
It is important for pet owners to recognize the symptoms of exophthalmos early on. A protruding eye accompanied by redness, swelling, or discharge should be seen as an alarm signal. Even if the protrusion of the eye appears more pronounced in certain dog breeds with prominent eyes like the Pug or Bulldog, unusual changes should always be clarified by a veterinarian.
The veterinarian will usually perform a comprehensive examination of the eye and surrounding structures. This includes a thorough inspection of the eye, measuring intraocular pressure, and possibly imaging procedures such as ultrasound or X-ray to identify the cause of the exophthalmos. Additionally, blood tests may be performed to rule out infections or systemic diseases.
In certain cases, a computed tomography (CT) or magnetic resonance imaging (MRI) may also be required to obtain more precise information about the condition of the structures behind the eye and to detect tumors or other abnormalities.
What the pet owner can do and professional therapy options
As a pet owner, there are some immediate measures that can be taken to provide relief for the dog until the veterinary examination. First, the affected dog should be kept in a quiet environment to avoid stress and further injuries.
It is advisable to avoid touching the affected eye to prevent additional pain or damage. If the dog tries to rub the eye, applying a protective collar can be helpful to avoid further irritation.
A clean, damp cloth can be used carefully around the eye to remove any discharge, though care should be taken not to apply pressure directly to the eye. Under no circumstances should homemade eye drops or medications be used without veterinary advice, as this could worsen the situation.
The most important measure, however, is to see a veterinarian as soon as possible to ensure an appropriate diagnosis and therapy. The veterinarian can then prescribe specific medications or treatments to treat the underlying cause and restore the dog’s well-being.
Outlook on current research
Current research on exophthalmos in dogs focuses on developing diagnostic tools to better identify the causes of the symptom. Scientists are working on improved imaging techniques such as high-resolution computed tomography (CT) and magnetic resonance imaging (MRI) to better visualize specific changes in the tissue around the eye. These methods help veterinarians distinguish between various possible causes such as tumors, inflammatory conditions, or infections.
Another area of research is the study of genetic predispositions that could favor exophthalmos in certain dog breeds. Some breeds, such as Pugs or Bulldogs, are more susceptible to this symptom due to their skull structure. Researchers are analyzing genetic markers associated with these structural features to develop a better understanding of how these factors increase the risk of exophthalmos.
Research projects are also investigating new treatment methods to alleviate the symptoms of exophthalmos. These include medicinal approaches to reduce inflammation or lower eye pressure, as well as surgical techniques to correct the position of the eye or relieve pressure from surrounding tissue. The combination of advanced diagnostic and therapeutic approaches aims to improve the quality of life for affected dogs.
Another field of research deals with the long-term prognosis of dogs with exophthalmos. Studies collect data on the course of the disease and the response to different treatments to identify factors that can influence the success of the therapy. These findings help veterinarians create more individualized and effective treatment plans.
In experimental research, new drugs are also being tested that specifically target molecular mechanisms involved in the development of exophthalmos. Such studies can open new ways to address the symptom directly rather than just treating the underlying causes.