To summarize, this study identified inner retinal thinning and optic atrophy as characteristic features of iCSNB due to hemizygous pathogenic mutations in CACNA1F. The inner retinal thinning was independent of myopia and mutation type; although there was variability in the presence of myopia in our cohort, GCL-IPL thickness was uniformly reduced, and thinner than a myopic control population. The gene discussed is CACNA1F; the disease is hereditary optic atrophy.