Retinitis Pigmentosa 20, also known as rp20, is related to mitochondrial dna-associated leigh syndrome and deafness, autosomal recessive 103. An important gene associated with Retinitis Pigmentosa 20 is RPE65 (Retinoid Isomerohydrolase RPE65), and among its related pathways/superpathways are Neuropathic Pain-Signaling in Dorsal Horn Neurons and Diseases of the neuronal system. Affiliated tissues include retina and eye, and related phenotypes are nystagmus and visual impairment