What Is Uveitis?
Uveitis is inflammation of the uvea — the middle layer of the eye that includes the iris, ciliary body, and choroid. When these tissues inflame, pets can develop a red, painful, cloudy, or light-sensitive eye. Dogs and cats both get uveitis; it is a clinical sign that something is wrong inside the eye or in the body, not a single disease with one cause.
Causes range from trauma and corneal ulcers that “spill” inflammation inward, to infectious disease, immune-mediated disease, high blood pressure (especially in cats), cancer, and idiopathic cases where a clear trigger is never found. Because uveitis can threaten vision and signal systemic illness, it deserves prompt veterinary — often ophthalmology — attention.
Why it matters
A painful red eye is not “wait and see.” Untreated uveitis can lead to glaucoma, cataracts, retinal damage, or permanent vision loss — and sometimes the eye is the first clue to infection or other internal disease.
Signs Owners Notice
- Squinting, tearing, or rubbing at one or both eyes
- Redness (often deeper/ciliary flush rather than only mild surface pink)
- Cloudiness, a hazy blue-gray look, or uneven pupil shape/size
- Light sensitivity; hiding in dark rooms; reluctance to be touched near the face
- Color change of the iris, visible pus/blood in the front chamber, or sudden vision trouble (bumping into objects)
Uveitis can look similar to conjunctivitis (“pink eye”), glaucoma, or corneal ulcers. Home antibiotic drops from a prior prescription are unsafe guesses — steroids in particular can worsen ulcers.
Diagnosis and Treatment
Your veterinarian examines the eye with magnification, measures intraocular pressure (uveitis often lowers pressure early; later secondary glaucoma can raise it), stains the cornea for ulcers, and may refer to a veterinary ophthalmologist. Bloodwork, blood pressure, infectious disease testing, and imaging are chosen based on species, region, and exam findings.
Treatment is individualized and may include:
- Topical anti-inflammatory drops (and sometimes pupil-dilating drops) under close supervision
- Pain control and activity restriction (E-collar to prevent self-trauma)
- Treatment of the underlying cause — infection, hypertension, immune disease, or other triggers
- Systemic medications when the disease is severe or part of a whole-body process
Rechecks matter because pressure can swing from low to dangerously high as inflammation evolves. Never start leftover human eye drops.
Practical Tips for US Pet Owners
- Keep an E-collar on if instructed — one rub can undo days of healing.
- Learn the drop schedule; set phone alarms so doses are not missed.
- Dim harsh lights and avoid dusty yards while the eye is painful.
- Ask whether blood pressure (cats) or tick-borne / fungal testing (region-dependent) is part of the workup.
- Return sooner if squinting worsens, the eye suddenly looks bigger/bulging, or vision seems to drop.
When to see a vet
Same-day veterinary care for a suddenly red, cloudy, or painful eye, unequal pupils, or obvious vision loss. Emergency care if the eye looks swollen under pressure signs, trauma is known, or the pet is extremely painful.
Key Takeaways
- Uveitis is inflammation inside the eye and a warning sign — not a mild “allergy pink eye” by default.
- Diagnosis pairs a full eye exam (including pressure) with a search for systemic causes when indicated.
- Prompt anti-inflammatory therapy and cause-directed care protect vision; rechecks catch secondary glaucoma.
FAQ
Is uveitis the same as glaucoma?
No. Glaucoma is high pressure inside the eye. Uveitis is inflammation and can cause secondary glaucoma later — which is why pressure checks are repeated.
Can allergies cause uveitis?
Simple environmental allergies more often drive itchy skin or conjunctivitis. True intraocular uveitis needs a broader medical workup than allergy eye drops alone.
Will my pet go blind?
Many pets keep useful vision with fast treatment. Delay, severe disease, or complications like glaucoma raise the risk — early care is the best protection.