Uveitis in Pigs: Painful Eye Inflammation Signs & Treatment
- See your vet immediately. Uveitis is painful inflammation inside the eye and can threaten vision if treatment is delayed.
- Common signs include squinting, tearing, light sensitivity, a red eye, a cloudy or blue-looking cornea, and a small or uneven pupil.
- In pigs, uveitis may follow eye trauma, corneal ulceration, infection, or body-wide illness, so your vet may need to look beyond the eye itself.
- Treatment often includes pain control plus prescription eye medications, but the safest plan depends on whether there is also a corneal ulcer or infection.
- Typical 2025-2026 US cost range for exam and initial treatment is about $150-$450; cases needing staining, tonometry, lab work, culture, sedation, or referral may run $500-$1,500+.
What Is Uveitis in Pigs?
See your vet immediately. Uveitis means inflammation of the uvea, the middle layer inside the eye that includes the iris and nearby tissues. In active anterior uveitis, vets often see redness around the eye, a painful squint, a constricted pupil, corneal haze or edema, and inflammatory protein in the front chamber of the eye called aqueous flare. Because the inflamed eye is painful, many pigs become head-shy, avoid bright light, or keep the eye partly closed.
Uveitis is not a single disease. It is a reaction pattern that can happen after trauma, corneal disease, infection, or inflammation elsewhere in the body. In pigs, that matters because an eye problem may be the first visible clue to a larger health issue, especially if your pig also seems feverish, off feed, lame, or generally unwell.
Fast treatment helps reduce pain and lowers the risk of complications such as adhesions inside the eye, cataract formation, glaucoma, or permanent vision loss. The right plan depends on the cause, so your vet will usually focus on both calming the eye inflammation and finding out why it started.
Symptoms of Uveitis in Pigs
- Squinting or holding the eye closed
- Redness around the eye or deep red vessels near the cornea
- Cloudy, blue, or hazy appearance to the eye
- Excess tearing or watery discharge
- Sensitivity to light or avoiding bright areas
- Small pupil, uneven pupils, or poor pupil response
- Rubbing the face, head shyness, or signs of eye pain
- Vision changes, bumping into objects, or reluctance to move
- Blood or pus-like material visible inside the eye
- Fever, poor appetite, stiffness, or skin lesions along with eye signs
Any pig with a painful, cloudy, or suddenly red eye should be seen promptly. Same-day care is especially important if the eye is closed, the cornea looks blue or white, the pupil looks abnormal, vision seems reduced, or your pig also has fever, lameness, or skin changes. Those extra signs can point to trauma, a corneal ulcer, glaucoma, or a body-wide infection rather than a minor surface irritation.
What Causes Uveitis in Pigs?
Uveitis in pigs can start with a local eye problem or with disease elsewhere in the body. Local triggers include blunt trauma, scratches from bedding or fencing, foreign material in the eye, and corneal ulcers. Corneal disease is important because a painful ulcer can trigger reflex inflammation inside the eye, and treatment choices change if an ulcer is present.
Systemic infection is another concern. Across species, uveitis can be linked to bacterial, viral, parasitic, fungal, or inflammatory disease. In pigs, your vet may think about septic illness, erysipelas, or other infectious conditions if eye inflammation appears along with fever, stiffness, skin lesions, poor appetite, or weakness. Some toxins and photosensitizing plant exposures have also been associated with uveitis in animals.
Sometimes the exact cause is never confirmed, especially if the eye improves quickly with treatment and the pig has no other symptoms. Even then, your vet will still want to rule out the most urgent look-alikes, including corneal ulceration and glaucoma, because those conditions can also cause a red, painful eye.
How Is Uveitis in Pigs Diagnosed?
Diagnosis starts with a careful history and eye exam. Your vet will look for classic signs of intraocular inflammation such as redness, corneal haze, a small pupil, aqueous flare, or inflammatory debris in the front of the eye. Because pigs may resist handling when the eye is painful, some need gentle restraint or sedation for a complete exam.
Most pigs with suspected uveitis benefit from fluorescein stain to check for a corneal ulcer and tonometry to measure intraocular pressure. Acute uveitis often causes low eye pressure, but pressure can be normal or even high if inflammation blocks fluid drainage. That is one reason a painful red eye should not be treated at home with leftover medications.
If your vet suspects a deeper cause, they may recommend a broader workup such as a full physical exam, temperature check, bloodwork, and testing directed at likely infections or inflammatory disease. In more complicated cases, referral to a veterinary ophthalmologist can help with slit-lamp examination, advanced imaging, or treatment planning when vision is at risk.
Treatment Options for Uveitis in Pigs
Spectrum of Care means you have options. Here are treatment tiers at different price points.
Budget-Conscious Care
- Urgent exam with your vet
- Basic eye exam and fluorescein stain to rule out a corneal ulcer
- Pain control, often with a systemic NSAID if appropriate for the pig and overall health status
- Targeted prescription eye medication when safe based on exam findings
- Short-term recheck to confirm the eye is less painful and less inflamed
Recommended Standard Treatment
- Complete eye exam with fluorescein stain and tonometry
- Prescription anti-inflammatory treatment tailored to whether the cornea is intact
- Cycloplegic medication such as atropine when appropriate to reduce painful ciliary spasm and help prevent adhesions
- Systemic medication for pain and inflammation
- Workup for likely underlying causes, which may include physical exam findings, bloodwork, and treatment for suspected infection or trauma
- One or more follow-up visits to monitor comfort, pupil size, corneal clarity, and eye pressure
Advanced / Critical Care
- Referral-level ophthalmic exam or farm-animal specialty care
- Sedation or anesthesia for a safer, more complete eye evaluation if needed
- Expanded diagnostics such as culture, cytology, imaging, or broader infectious disease testing
- Intensive treatment for severe pain, corneal ulceration, glaucoma risk, or body-wide illness
- Hospitalization or frequent rechecks for pigs that are systemically sick or at risk of losing vision
- Surgical or salvage procedures in rare end-stage cases when the eye is blind and persistently painful
Cost estimates as of 2026-03. Actual costs vary by location, clinic, and individual case.
Questions to Ask Your Vet About Uveitis in Pigs
Bring these questions to your vet appointment to get the most out of your visit.
- Does my pig have true uveitis, or could this be conjunctivitis, a corneal ulcer, or glaucoma?
- Did you find an ulcer or scratch on the cornea that changes which eye drops are safe?
- Is the eye pressure low, normal, or high, and what does that mean for comfort and vision?
- Do you suspect trauma, infection, or a body-wide illness as the cause?
- Which medications are for pain control, which reduce inflammation, and how often should I give them?
- What warning signs mean I should come back the same day, such as more cloudiness, a closed eye, or loss of appetite?
- How soon should we recheck the eye to make sure the treatment is working?
- If this does not improve quickly, when would referral to a veterinary ophthalmologist make sense?
How to Prevent Uveitis in Pigs
Not every case can be prevented, but you can lower risk by reducing eye trauma and infection pressure. Keep housing clean, dry, and well ventilated. Remove sharp wire ends, rough feeders, and bedding or hay with irritating debris that can scratch the eye. If pigs are transported or mixed, minimizing stress also matters because stress can worsen infectious disease problems in swine herds.
Prompt care for any red, tearing, or squinting eye is one of the best prevention tools. Early treatment of corneal ulcers, eyelid injuries, and foreign material may stop secondary inflammation from spreading deeper into the eye. Do not use leftover eye medications unless your vet says they are safe, because some anti-inflammatory drops can make an ulcer worse.
Good herd health also helps. Work with your vet on vaccination, parasite control, sanitation, and quick isolation of pigs showing fever, skin lesions, lameness, or other signs of contagious illness. For example, routine vaccination and hygiene are important tools for preventing acute swine erysipelas, one of the infectious diseases your vet may consider when eye inflammation appears alongside systemic signs.