Uveitis in dogs is inflammation of the uvea, the pigmented middle layer of the eye, and it is painful and time-sensitive. A red, squinting eye that hates the light, with a small pupil or a bluish haze, should see a vet the same day. Left alone, uveitis can lead to glaucoma, cataracts and permanent sight loss, so in the UK this is a phone-the-practice-now problem, not a wait-until-Monday one.
The signs UK owners tend to notice first
The Merck Veterinary Manual describes the typical picture of anterior uveitis: a constricted pupil, a swollen iris, a red conjunctiva, light sensitivity, spasmodic blinking and low pressure inside the eye (Gelatt, Merck Veterinary Manual, updated 2024). At home that means:
- Squinting or a half-shut eye, often with the third eyelid showing.
- Deep redness, sometimes a red ring round the clear cornea.
- A pinpoint pupil that stays small in a dim room.
- A blue-grey haze, caused by cells and protein inside the eye.
- Pawing at the face, tearing, or turning away from bright light, including a low winter sun on the morning walk.
What causes it, and what UK vets look for
One inflamed eye points to trauma, a tumour or a parasite. Both eyes inflamed makes vets think of infection or an immune disorder (Merck Veterinary Manual). In a series of 102 dogs, Massa et al. (2002) found that about a quarter had ocular or systemic neoplasia, with lymphoma making up 17% of all cases. That is why your vet may suggest bloodwork and scans, not just drops.
Travel history matters here. Dogs that have been to, or come from, southern Europe can carry infections such as ehrlichiosis, and tick-borne disease is one of the infectious causes of uveitis that vets consider. Tell your vet about holidays abroad and rescue dogs imported from overseas. Akitas, Siberian Huskies and Samoyeds are also known for an immune-mediated syndrome combining uveitis with loss of skin and coat pigment.
How it is diagnosed and treated
Your vet will stain the cornea to rule out an ulcer, measure the pressure in each eye with a tonometer (low in uveitis, high in glaucoma) and examine the iris and lens with a slit light. Blood tests, urinalysis, infectious-disease screening and imaging usually follow.
Treatment calms the eye and chases the cause. Prescription anti-inflammatory drops (a corticosteroid or an NSAID, chosen after the ulcer check), a drop to keep the pupil from sticking to the lens, and sometimes tablets are standard, along with a dim room and a cone. These are prescription-only veterinary medicines, so never use leftover drops from a previous dog or a previous problem. If the eye is not settling, ask your practice about referral to a specialist in veterinary ophthalmology (RCVS-recognised specialist or ECVO diplomate).
Why speed matters
Secondary glaucoma is the big risk. Across nearly 1.6 million dogs seen at North American teaching hospitals between 1964 and 2003, uveitis was behind 399 secondary glaucoma cases (7.1%), and cataracts featured in 81% of all secondary glaucomas (Gelatt and MacKay, 2004). Quick control of inflammation protects more of the eye.
A practical note on insurance
Uveitis is often a long-term, recurring condition. Under a lifetime policy, ongoing cover is usually available year after year; time-limited or maximum-benefit policies can run out, and anything seen before the policy began may be treated as pre-existing. Check your policy wording before a referral.
A calm routine at home
- Give every dose on schedule. Stopping early is the classic reason uveitis flares.
- Shade the eye: dim room, short lead walks, no bright low sun.
- Clean only the skin and fur round the eye, gently. Do not flush the eye itself unless your vet says so.
- Leave about five minutes between different drops.
- Book every recheck. Pressure checks catch glaucoma before you can see it.
For step three we made our gentle dog eye drops, a pH-neutral, non-medicated eye-area rinse for faces that are sore from medication, crusting and tear staining. pH 7.0 to 7.2, ophthalmic-grade and 10-micron sterile-filtered, with sodium hyaluronate 0.05%, aloe vera 8%, chamomile 2% and sodium phytate 0.15%, and no alcohol or fragrance. Typical cosmetic tear-stain cleaners often leave the pH and the actives unstated. To be clear, these do not treat uveitis or replace anything your vet prescribes. Made in North America under GMP, 120 mL, with free worldwide shipping, including to the UK. See the full dog eye care range.
For related reading, see warning signs of a dog eye infection, dog eye ulcer and dog cloudy eye.
When to ring your vet
- Same day: a red, squinting eye with a small pupil, new haze or a swollen eye.
- Out-of-hours emergency vet: eye trauma, a bulging or hard-feeling eye or severe pain, including at weekends and bank holidays.
- Within 24 hours: drops seem to stop working or the other eye turns red.
Frequently asked questions
Is uveitis in dogs an emergency?
Treat it as one. It is painful and can lead to glaucoma, cataracts and sight loss, so get the eye examined the same day.
Can uveitis in dogs be cured?
It depends on the cause. Trauma or a treatable infection often resolves, while immune-mediated cases may need long-term medication and regular pressure checks.
Can I use leftover eye drops?
No. Steroid drops can make an ulcer worse, so use only what your vet prescribes after an eye exam.
Veterinary disclaimer: this article is educational and does not replace an examination by a registered veterinary surgeon. If your dog has a red, painful or cloudy eye, contact your vet or an out-of-hours clinic promptly.
Scientific References
- Massa KL, Gilger BC, Miller TL, Davidson MG. Causes of uveitis in dogs: 102 cases (1989-2000). Veterinary Ophthalmology. 2002;5(2):93-98. PMID 12071865
- Gelatt KN, MacKay EO. Secondary glaucomas in the dog in North America. Veterinary Ophthalmology. 2004;7(4):245-259. PMID 15200621
- Gelatt KN. Anterior Uveitis in Dogs. Merck Veterinary Manual, Dog Owners edition (updated September 2024). merckvetmanual.com