Pannus (Chronic Superficial Keratitis) in Dogs — Welfare and Management

Pannus is a progressive immune-mediated eye condition primarily affecting German Shepherds and related breeds, causing corneal vascularisation and pigmentation that leads to blindness if untreated.

Key Facts

Pannus is most common in German Shepherds, Belgian Malinois, Greyhounds, and Border Collies
UV light is a key trigger — dogs at higher altitudes or in sunny climates are more severely affected
Early signs include pinkish vascularisation of the lateral cornea, typically beginning at 3-4 years of age
Without treatment, progressive pigment deposition leads to partial or complete blindness
Topical cyclosporine or tacrolimus is the first-line treatment — applied twice daily lifelong
Corticosteroid eye drops provide additional anti-inflammatory effect during flares
The condition is not curable but is very effectively managed with appropriate topical therapy

Welfare Considerations

Pannus creates a long-term welfare management challenge that requires sustained owner commitment. The progressive nature of untreated pannus means that dogs diagnosed early but not treated consistently will gradually lose vision over months to years — a welfare harm that is entirely preventable with affordable topical medication. Owners who understand the progressive nature and lifelong treatment requirement achieve much better welfare outcomes than those who treat intermittently or stop when signs appear to resolve. The condition is painful during active flares, with affected dogs showing blepharospasm, pawing at the eye, and photophobia. UV protection through dog-specific goggles (Doggles) reduces disease progression and is particularly valuable for working dogs in high-UV environments. German Shepherd breeders should screen breeding stock for pannus given the strong hereditary component, reducing the frequency of the condition in future generations. Regular ophthalmology review every 6-12 months monitors for disease progression.

What You Can Do

Have any reddish corneal changes in your dog examined promptly by a vet ophthalmologist
Apply topical cyclosporine consistently — twice daily, lifelong, even when eyes look normal
Use UV-protective goggles for German Shepherds in high-altitude or sunny environments
Schedule 6-12 monthly eye checks to monitor disease progression
Support breeding programs that screen German Shepherds for heritable eye conditions
Learn the early signs of pannus to support prompt detection in rescue dogs