Exophthalmos in Rabbits: Bulging Eye, Dental Causes, and Urgent Care

See your vet immediately. Exophthalmos means the eyeball is pushed forward out of its normal position in the socket. In rabbits, this is usually not a surface-eye problem alone. It often means there is swelling, infection, a mass, bleeding, or another space-occupying problem behind the eye.

A rabbit with exophthalmos may have one eye that looks suddenly larger, more prominent, or unable to blink normally. Because rabbits rely on normal eyelid closure to protect the cornea, the exposed eye can dry out fast. That can lead to irritation, ulcers, and pain.

One reason this condition is especially important in rabbits is the close relationship between the cheek teeth roots and the tissues behind the eye. Dental disease can extend into the orbit and create a retrobulbar abscess, which is a pocket of infection behind the eye. Even if your rabbit is still eating, a bulging eye should be treated as urgent.

The most common cause your vet may look for is dental disease involving the cheek teeth roots. Rabbit teeth grow continuously through life, and abnormal wear, malocclusion, or chronic dental disease can let infection track into the bone and tissues behind the eye. That can form a retrobulbar abscess and physically push the eye forward.

Other possible causes include orbital cellulitis, trauma with bleeding behind the eye, tumors or other masses, severe inflammation, and less commonly spread of infection from nearby tissues. In some rabbits, there may also be related signs such as nasal discharge, facial swelling, drooling, or trouble chewing.

Because several different problems can look similar from the outside, a bulging eye should not be assumed to be "pink eye" or a minor irritation. Your vet will need to sort out whether the main issue is dental, infectious, traumatic, or neoplastic before discussing treatment options.

Diagnosis starts with a careful physical exam, eye exam, and oral exam. Your vet will compare both eyes, check whether the cornea is drying or ulcerated, and look for pain, discharge, third-eyelid protrusion, or reduced ability to retropulse the globe. They will also assess eating history, droppings, weight, and signs of dental discomfort.

Because rabbit cheek teeth disease is often hidden below the gumline, imaging is commonly needed. Skull radiographs can help identify elongated tooth roots, bone changes, and abscesses. In more complex cases, CT gives a much clearer view of the orbit, tooth roots, and any retrobulbar mass. Sedation or anesthesia may be needed for a complete oral exam and imaging.

Depending on what your vet finds, additional tests may include fluorescein stain for corneal ulcers, bloodwork before anesthesia, culture of abscess material, or biopsy if a mass is suspected. The goal is not only to confirm exophthalmos, but to identify what is pushing the eye forward so treatment can be matched to your rabbit's condition.

Not every case can be prevented, but many rabbit eye-bulging cases are linked to chronic dental disease, so prevention starts with dental health. Rabbits need a hay-based diet every day to help wear down continuously growing teeth. Regular wellness visits with your vet also matter, because cheek teeth problems can progress quietly before obvious symptoms appear.

Watch for subtle early signs such as selective eating, dropping food, wet chin, smaller droppings, tearing, or mild facial asymmetry. These can show up before a rabbit develops a visible bulging eye. Prompt dental evaluation may help your vet address disease before infection spreads deeper into the jaw or orbit.

Good home care also includes safe housing, avoiding facial trauma, and getting any eye discharge or swelling checked early. If your rabbit has a history of dental disease, ask your vet how often rechecks are needed. For some rabbits, prevention is less about avoiding every problem and more about catching changes early enough to keep treatment options open.