Table 2: Details in regards to dogs in the masked ERG study. The genotypes are given as −/− for genetically affected, +/− for carriers, and +/+ for genetically clear individuals of the 44 bp deletion in exon 2 of the RPGRIP1 gene. The age at the time for ophthalmic and ERG examinations is given as years (y) and months (m).

Dog number RPGRIP1 genotype Age at ERG ERG results Other clinical findings 1 −/− 9 y 2 m Abnormal Normal vision, fundus normal 2 +/− 8 y 7 m Normal Normal vision, fundus normal 3 +/− 7 y 9 m Normal Normal vision, fundus normal 4 +/− 7 y 9 m Normal Normal vision, fundus normal 5 +/− 13 y 10 m Normal Normal vision, fundus normal 6 +/− 11 y 11 m Normal Normal vision, fundus normal 7 −/− 9 y 2 m Abnormal Normal vision, fundus abnormal 8 −/− 9 y 2 m Abnormal Normal vision, fundus abnormal 9 −/− 8 y 4 m Normal Normal vision, fundus normal 10 +/− 9 y 4 m Normal Normal vision, fundus normal 11 +/− 8 y Normal Normal vision, fundus normal 12 +/+ 9 y 3 m Normal Normal vision, fundus normal 13 −/− 12 y 4 m Abnormal Reduced vision, fundus abnormal 14 −/− 7 y Normal Normal vision, fundus normal