However, recent studies showed that GSTM1 positive (GSTM1+/+) genotype was associated with a susceptibility to age-related cortical cataract in Asians [15], while GSTM1 or GSTT1 null genotype was associated with age-related cataract risk in Caucasians [16, 17]. The gene discussed is GSTM1; the disease is cataract.