Pannus is a progressive, immune-mediated eye condition in dogs that causes chronic discomfort and vision impairment if untreated.
Untreated pannus causes persistent corneal irritation, sensitivity to light, and gradually worsening vision loss that diminishes quality of life in active working and companion dogs. Dogs cannot communicate discomfort clearly, so owners must monitor for squinting, eye rubbing, and behavioral changes suggesting vision problems. Compliance with lifelong medication is essential to prevent disease progression. UV-protective goggles reduce sun exposure in affected dogs, demonstrating how simple management changes can meaningfully improve chronic disease welfare.