GALK1 and early-onset non-syndromic cataract: Genes linked with inherited forms of cataracts represent likely candidate genes for age-related cataracts; however, only the “Osaka” variation (p.A198V) in the gene for autosomal recessive galactokinase-deficiency and congenital cataracts (GALK1) has so far been associated unambiguously with age-related cataracts, and this association appears to be limited to East Asian populations [33,34].