SCLT1 and retinitis pigmentosa 1: Among these genes, compound heterozygous SCLT1 variants (c.1218 + 3insT in the 3 bp downstream of the exon 14-intron 14 boundary and c.1631A > G at the 2 bp upstream of the exon 17-intron 17 boundary) remained as a strong candidate, as pathogenic variants of SCLT1 have been previously reported to be a cause of Oro-Facio-Digital syndrome type IX20 and non-syndromic retinitis pigmentosa (RP)21.