Lysine codon 88 (AAG) in exon 4 was changed to asparagine (AAC) (p.K88N) using an sgRNA and an ssODN template with CRISPR/Cas9 technology. The mutation, in the homeodomain (HD) of the encoded peptide, is the equivalent of same human mutation associated with dominant Leber congenital amaurosis 7 (LCA7).