label: X-linked progressive retinal atrophy 1, RPGR-related, dog
label_lc: x-linked progressive retinal atrophy 1, rpgr-related, dog
description: X-linked form of progressive retinal atrophy that occurs in dogs due to a mutation in the RPGR gene and is characterized by normal photoreceptor morphogenesis, after which progressive rod–cone degeneration develops in the peripheral retina, gradually advancing toward the optic disc.