Chronic Superficial Keratitis (Pannus) in Dogs: Managing a Lifelong Eye Condition

Pannus, or chronic superficial keratitis, is a progressive, immune-mediated eye condition affecting certain dog breeds that causes corneal pigmentation, vision impairment, and if untreated, permanent blindness — requiring lifelong management and careful welfare monitoring.

Key Facts

Pannus is most common in German Shepherd Dogs, Belgian Malinois, Greyhounds, and Siberian Huskies
The condition involves immune cells invading the cornea, causing inflammation, vascularisation, and brown pigment deposition
UV light significantly worsens pannus — dogs at high altitude or in sunny climates progress more rapidly
Without treatment, pannus causes progressive vision loss and eventual blindness from corneal opacification
Treatment with topical immunosuppressants (cyclosporine or tacrolimus) is highly effective at controlling progression
Management is lifelong — stopping treatment causes rapid relapse even in well-controlled cases
Protective UV-filtering dog goggles (Doggles) can reduce UV exposure and slow disease progression in high-risk environments

Welfare Considerations

Pannus causes genuine welfare impact through visual impairment and, in severe cases, blindness. Dogs with significantly reduced vision experience increased anxiety, difficulty navigating, and reduced ability to engage in normal activities. The chronic nature of the condition means that welfare management must be maintained indefinitely — owners who treat pannus episodically rather than consistently allow progressive damage to accumulate between treatment courses. The good news is that with consistent treatment, most dogs maintain good vision and comfortable eyes for their entire lives. The welfare obligation is to diagnose early (before significant pigment deposition), treat consistently with appropriate medications, and protect from UV exposure — a management package that is achievable for most owners.

What You Can Do

Schedule prompt veterinary ophthalmology assessment if your dog shows cloudiness, redness, or pigment changes on the eye surface
Maintain consistent treatment with prescribed topical medications — even when eyes look clear, stopping allows rapid relapse
Invest in UV-protective dog goggles for affected dogs, particularly during outdoor activities at high altitude or in bright sun
Keep follow-up appointments with a veterinary ophthalmologist to monitor disease progression and adjust treatment
Inform breeders if their dogs develop pannus — the condition has a heritable component and should influence breeding decisions
Join breed-specific health forums to stay updated on advances in pannus management and connect with other owners