Fig. (4) Bonferroni posthoc analysis showed a significant reduction in DMR/SMR ratio in patients with POAG or OHT in therapy with Prostaglandin Analogues (PG) compared to affected patients treated with eyedrops not containing PG or alpha adrenergic agonists (NOPG, p<0,0001) and to control healthy subjects (CTRL, p<0,0001).