Figure 2 of Rocha, Mol Vis 2011; 17:1679-1686.

Figure 2. Differences of means for the parameter of optic nerve damage (ONR: DEF) of the right eye for the combined genotypes of GSTM1 and GSTP1. The POAG patients carrying the higher-risk genotype combination of GSTM1 and GSTP1 (GSTM1-/GSTP1 variant) presented higher mean value of ONR:DEF than individuals carrying at least one functional copy of GSTM1. *CI: Confidence Interval.