Central progressive retinal atrophy (CPRA) is a degenerative retinal disease that affects both eyes. It is less common than PRA and occurs in older dogs. CPRA affects the pigment cells at the center of the retina. It is recognized in Labrador Retrievers, Golden Retrievers, Shetland Sheepdogs, Border Collies, Redbone Coonhounds, and other dog breeds.
Because the central part of the retina (where the dog sees best) is the primary target of the disease, a dog with CPRA is unable to see stationary objects well, especially in bright light. However, the dog is still able to see moving objects because motion is perceived at the periphery of the retina. Although vision decreases as the disease progresses, complete blindness is rare.
This is another problem that can be diagnosed on a CERF exam and also through genetic testing. There is currently no treatment.