Corneal Ulcers in Rabbits: Cloudy Eye, Pain, and Emergency Treatment

A corneal ulcer is an open sore or defect in the cornea, the clear outer surface at the front of the eye. In rabbits, corneal ulceration is one of the most common eye problems. Their eyes are large and prominent, and rabbits blink less often than many other species, so the cornea can be more vulnerable to drying and trauma.

A mild ulcer may affect only the surface layer and heal with medication and close follow-up. A deeper ulcer can threaten vision, and a melting ulcer can progress fast enough to risk rupture of the eye. That is why a rabbit with a cloudy, painful, or suddenly squinty eye should be treated as an urgent case.

For pet parents, the first signs are often subtle: more tearing, a half-closed eye, light sensitivity, or a bluish-white haze over the eye. Rabbits also hide pain well. If your rabbit seems quieter, eats less, or produces fewer droppings along with eye changes, your vet should see them right away.

Most rabbit corneal ulcers begin with irritation or trauma. Common triggers include hay stems, bedding pieces, dust, scratches from grooming or another rabbit, and accidental injury from cage furniture or rough handling. Because the cornea is exposed, even a small scratch can become very painful.

Mechanical problems can also keep the cornea irritated. Eyelid masses, abnormal eyelash contact, poor eyelid closure, or foreign material trapped under the eyelid may repeatedly rub the eye. Reduced tear protection or surface dryness can make healing slower and increase the chance that a small abrasion turns into a true ulcer.

Not every cloudy rabbit eye is a corneal ulcer. Your vet may also consider conjunctivitis, uveitis, lens problems, dental disease affecting the eye area, or infections such as Encephalitozoon cuniculi when the appearance is not typical. That is one reason an exam matters before any eye medication is used.

Your vet usually starts with a careful eye exam, looking for squinting, discharge, corneal haze, eyelid problems, and anything that could be rubbing the eye. A fluorescein stain is commonly used to confirm an ulcer. This dye sticks to areas where the corneal surface is missing, helping your vet see the size and shape of the defect.

Your vet may also check for a foreign body, evaluate tear coverage, and look for signs that the ulcer is deep, infected, or melting. In some rabbits, sedation is needed for a complete exam if pain is severe or the rabbit is too stressed to safely handle.

If the eye looks unusually inflamed or the ulcer is not the whole story, your vet may recommend additional testing to rule out other causes of a cloudy or painful eye. Depending on the case, that can include pressure testing, skull or dental imaging, or tests aimed at underlying disease. Recheck staining is often part of diagnosis too, because healing progress helps guide the next step.

Not every corneal ulcer can be prevented, but reducing eye trauma goes a long way. Keep hay racks, bedding, and enclosure furniture arranged so sharp ends are less likely to poke the eye. Choose clean, low-dust hay and bedding, and remove debris that could blow or rub into the eye.

Daily observation matters. Check for tearing, squinting, redness, or a new cloudy look, especially after playtime, bonding sessions, grooming, or nail trims. Early care for mild irritation may prevent a deeper ulcer from developing.

Good overall rabbit care also supports eye health. Safe handling lowers the risk of struggling injuries. Regular veterinary exams can help catch eyelid problems, dental disease, or other conditions that may contribute to chronic eye irritation. If your rabbit has had one ulcer before, ask your vet what home setup changes could lower the chance of another one.