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A 12-year-old boy with a history of decreased vision and photophobia since he was 1 year old. Comprehensive clinical and molecular approaches were applied to evaluate his condition by which a detailed ophthalmological examination revealed bilateral isolated foveal hypoplasia with the absence of the avascular zone. Novel homozygous aryl hydrocarbon receptor ( AHR ) splice site mutation NM_001621.4: c.899_908 + 15del (p.?) was identified and segregated within the family members. This case represents the first report of autosomal recessive isolated foveal hypoplasia without infantile nystagmus in the literature and the second reported  AHR  mutation with autosomal recessive isolated foveal hypoplasia post the original cloning paper. Our identified novel splice site  AHR  mutation supports the pathogenicity of the  AHR  gene and expands its phenotypic spectrum.

Novel biallelic AHR splice site mutation cause isolated foveal hypoplasia in Saudi patient: a case report