(C) Schematic illustration of NGS using a 266-gene retinal dystrophy panel showing a complex chromosome 3q22 duplication rearrangement resulting in an inverted 48 kb triplicated region embedded within a 188 kb duplication forming three apparently intact RHO genes on one allele and a fourth, unaltered RHO on the homologous allele. This evidence concerns the gene RHO and inherited retinal dystrophy.