Similar to previous reports about an increased radiation sensitivity of Atm or Mrad9 heterozygous mutants for cataracts (Worgul et al. 2002, 2005; Hall et al. 2006; Kleiman et al. 2007), we tested for increased genetic susceptibility in heterozygous Ercc2 mutants (also known as Xpd; Kunze et al. 2015). Here, ATM is linked to cataract.