To date, the following 25 genes have been implicated in the pathogenesis of LCA: AIPL1, CABP4, CCT2, CEP290, CLUAP1, CRB1, CRX, DTHD1, GDF6, GUCY2D, IFT140, IMPDH1, IQCB1, KCNJ13, LCA5, LRAT, NMNAT1, OTX2, PRPH2, RD3, RDH12, RPE65, RPGRIP1, SPATA7, TULP1 [3]. This evidence concerns the gene GUCY2D and Leber congenital amaurosis.