CAST and myopia: We found that there was a transition from a “high susceptibility” gene expression pattern in CAST/EiJ mice, which developed − 18.7 ± 3.1 D of myopia, to a “low susceptibility” gene expression pattern in NZO/HlLtJ mice, in which only − 5.5 ± 2.1 D of myopia was induced by visual form deprivation.