USH2A and retinitis pigmentosa 1: Among the 60 different genes associated with RP found in their cohort, the most common genes were RPGR, USH2A, RHO, RP1, RP2, PDE6B, PRPF31, NR2E3, RDH12, SNRNP200, PRPF8, PRPF3, CNGB1, EYS, and PRPH2.