PetA corneal ulcer is a scratch or erosion of the eye's clear surface, and it's both common and genuinely urgent — a squinting, weepy, painful eye needs to be seen quickly, because a superficial ulcer that's cheap to fix can turn into a sight-threatening emergency if it's left. Most heal well with drops and time; the cost climbs sharply only when an ulcer gets deep or infected. Here's the Canadian picture and why flat-faced breeds are at the centre of it.
What it costs in Canada
| Scenario | Typical cost (CAD) |
|---|---|
| Exam + fluorescein stain to diagnose | ~$100–$300 |
| Simple superficial ulcer — drops + rechecks | ~$150–$600 total |
| Medicated eye drops / ointment | ~$40–$200 |
| Deep / infected / 'melting' ulcer — surgery | ~$1,000–$3,000+ |
| Veterinary ophthalmologist referral | Consult ~$200–$400; surgery higher |
| Recheck stains until healed | ~$80–$200 each |
These figures are estimates for general guidance only, not quotes, compiled from publicly available Canadian veterinary pricing. The gap between the low and high ends is entirely about depth and infection: a superficial scratch usually heals with drops and a couple of rechecks, while a deep, infected, or rapidly worsening ('melting') ulcer can need surgery — a graft or other procedure — often by a veterinary ophthalmologist, to save the eye. Catching it early keeps almost every case in the cheaper band. See How we estimated these costs.
With insurance vs paying out of pocket
| Scenario | You pay | Insurer pays |
|---|---|---|
| No insurance — simple case | Full $150–$600 | $0 |
| Comprehensive policy (in force before symptoms) | Deductible + co-insurance share | Diagnosis, drops, rechecks — and surgery — up to limits |
| Deep ulcer needing eye surgery (comprehensive) | Deductible + co-insurance on a larger bill | Surgery, ophthalmologist, follow-up, up to limits |
| No policy until after the ulcer appears | Full cost — pre-existing to any new policy | $0 |
Simple ulcer or emergency? It comes down to depth
Most corneal ulcers are superficial — a scratch from a bush, a scuffle, or a bit of grit — and heal within days to a week or two with medicated drops, pain relief, and an e-collar to stop rubbing. That's the inexpensive, common outcome. The danger is an ulcer that goes deep, gets infected, or starts to \"melt\" (a rapid enzymatic breakdown of the cornea): those can progress to a ruptured eye within days and need urgent surgery — a conjunctival graft or similar — to save vision. The same starting scratch can be a $300 problem or a $3,000 one depending on how fast it's treated, which is why any painful, squinting eye is a same-day vet visit.
Why flat-faced breeds are especially at risk
Brachycephalic (flat-faced) breeds — French Bulldogs, Pugs, Boston Terriers, Shih Tzus, and Persians among cats — are far more prone to corneal ulcers. Their prominent, shallow-set eyes are more exposed, they often blink less completely, and some have hair or lid abnormalities that rub the surface. For these breeds an ulcer isn't a freak event; it's a foreseeable, sometimes recurring cost — one more reason the flat-faced breeds are among the most insurance-relevant.
Does corneal ulcer cost vary by city?
A simple ulcer treated at a general practice is priced consistently and handled anywhere. The costs that concentrate regionally are the surgical and specialist ones: a veterinary ophthalmologist for a deep or complex ulcer is a specialist found mainly in major metros (Toronto, Vancouver, Calgary, Ottawa, Montreal). A family outside a big centre may travel for surgery, but the routine drops-and-rechecks care that resolves most ulcers is available at any local clinic.
How insurance covers corneal ulcers
Comprehensive (accident-and-illness) pet insurance covers corneal ulcers — the exam, diagnostics, medication, rechecks, and any surgery — provided the eye problem wasn't pre-existing before your policy started. For a flat-faced breed, this matters twice over: they're prone to ulcers and to other eye and airway issues, so a condition that shows up early can be excluded on a later policy. Insure a healthy pet — especially a brachycephalic one — before any eye trouble, and ulcers are covered; wait until the first squinting eye and it may be on you. See dog eye surgery costs and best pet insurance in Canada.
How we estimated these costs
The dollar figures here are estimates for general guidance, not quotes, compiled from publicly available Canadian veterinary pricing. Real costs vary by clinic, province, the depth of the ulcer, and whether surgery is needed — confirm with your own vet. Sources we drew on:
- Canadian corneal ulcer and ophthalmology cost ranges: our Canadian Vet Cost Index, compiled from publicly available Canadian clinic pricing.
- Surgical context from our own dog eye surgery cost guide.
Considering insurance?
A simple corneal ulcer is cheap, but a deep or melting one can mean $1,000–$3,000+ of eye surgery — and flat-faced breeds are especially prone. Comprehensive insurance covers it if you enrolled before the eye trouble. Insure a healthy pet and ulcers like these are covered. Compare Canadian plans.