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Box plots of the thresholds for subgroups tested on both systems. Groups are separated by their diagnosis and by system. Boxes show 25–75% range of values, whiskers denote full range. adRP autosomal dominant retinitis pigmentosa, arRP autosomal recessive RP, isoRP isolate RP, LCA Leber congenital amaurosis, Usher Usher Syndrome, CRD cone-rod dystrophy
