Retinitis Pigmentosa, also known as rod-cone dystrophy, is related to cone-rod dystrophy 2 and usher syndrome. An important gene associated with Retinitis Pigmentosa is CRX (Cone-Rod Homeobox), and among its related pathways/superpathways are Olfactory Signaling Pathway and Visual phototransduction. The drugs Vitamin A and Lutein have been mentioned in the context of this disorder. Affiliated tissues include Eye and retina, and related phenotypes are intellectual disability and nystagmus