Mutations in genes encoding proteins important in the development and maintenance of the structural integrity of the lens such as crystallins, connexins and aquaporins [1,2] are typically associated with isolated congenital cataracts while mutations in the transcription factor genes PAX6[3], FOXE3[4], EYA1[5], MAF[6], and PITX3[7] have been described in congenital cataract with anterior segment dysgenesis (ASD). The gene discussed is MAF; the disease is early-onset non-syndromic cataract.