Moreover, mice deficient in Sod1 have increased superoxide radicals in their lenses, decreased levels of the antioxidant glutathione, and develop cataracts earlier and with higher frequency (Olofsson et al, 2009, 2012), while overexpression of SOD1 in the lens prevented H2O2‐induced cataracts (Lin et al, 2005). Here, SOD1 is linked to cataract.