The RPGR gene was also known as COD1, CORDX1, CRD, orf15, PCDX, RP3, RP15, or XLRP3. Inheritance of RP3 was described as X-linked recessive, while in RP15, both males and carrier females affected presented a wide spectrum of clinical features ranging from asymptomatic to severe RP. This evidence concerns the gene RPGR and retinitis pigmentosa 1.