The retina is the smooth surface that rounds the interior of the eye. In retinal dysplasia, the retina is wrinkled or folded. It’s not possible to tell how your Cavalier King Charels Spaniels eyesight may be affected by retinal dysplasia, but many Cavalier King Charles Spaniels appear to have no discomfort or difficulty. However, in other breeds, cases of retinal dysplasia have been observed where the animal’s retinas became detached, causing blindness. For the most part, retinal dysplasia is of primary concern to Cavalier King Charles Spaniel breeders who work to avoid promoting this hereditary condition.