Fig. 1

Percentage of subjects found to have given up driving in the baseline cross-sectional study. The proportions and percentages were 11/148 (7%) in the control group, 9/173 (5%) in the mild POAG group, 0/22 (0%) in the moderate POAG group, and 5/16 (31%) in the severe POAG group (p = 0.001, Fisher’s exact test). We defined mild POAG as a visual field defect corresponding to an MD of − 6 dB or better in the better eye, moderate POAG as an MD of > − 6 dB to − 12 dB in the better eye, and severe POAG as an MD of > − 12 dB or worse in the better eye