USH2A and retinitis pigmentosa 1: AD-RP is most commonly linked to mutations in the rhodopsin (26.5% of all cases), AR-RP to mutations in the USH2A (8%–9% of all cases), and XL-RP to mutations in the RPGR and RP2 (85%–95% of cases) genes (Bhardwaj et al., 2022).