Pannus is an immune-mediated corneal disease common in German Shepherd Dogs and related breeds that causes progressive blindness without treatment, requiring lifelong topical medication to protect vision.
Pannus welfare centers on the vision that consistent medication preserves. Dogs that receive daily topical cyclosporine maintain clear corneas and normal vision for their entire lives. Dogs whose medication is inconsistent or discontinued experience progressive corneal pigmentation that worsens with each UV exposure, eventually resulting in blindness. The welfare difference between consistent and inconsistent treatment is the difference between a dog that sees and one that does not. UV-protective doggles provide meaningful welfare benefit for pannus dogs with significant outdoor exposure, reducing the UV damage that accelerates disease progression.