An inherited retinal disease subtype in which the rod photoreceptors appear to be more severely affected than the cone photoreceptors. Typical presentation is with nyctalopia (due to rod dysfunction) followed by loss of mid-peripheral field of vision, which gradually extends and leaves many patients with a small central island of vision due to the preservation of macular cones. The phenotype is Human Phenotype Ontology identifier HP_0000510 (Rod-cone dystrophy). Also known as: Retinitis pigmentosa, Rod cone dystrophy.