RPGR and retinitis pigmentosa 1: In the RP subgroup, the top five genes in which variants that solved the proband were detected consisted of USH2A, EYS, RHO, RP1, and PDE6A. This set of genes is comparable to the genes listed in a recent review by Verbakel et al. on RP, which includes a shortlist of frequently mutated genes (USH2A, RPGR, EYS, RHO, and RP1) (Verbakel et al., 2018).