In the 7–17-year-olds, 45.1% of the syndromic patients carried disease-causing mutations in ciliopathy-associated genes (19% Usher syndrome: USH2A (11.7%); CDH23 (3.9%), CLRN1 (3.9%); 11.8% Joubert or Senior Loken syndromes: CEP290 (3.9%), CEP120 (1.9%); IQCB1 (3.9%), WDR19 (1.9%); 9.8% Bardet–Biedl syndrome: BBS10 (7.8%); BBS12 (1.9%). This evidence concerns the gene CDH23 and Bardet-Biedl syndrome.