Fig 3. Reduction (%) of clock-hour RNFL thickness in NAION and POAG compared with fellow eyes and normal control eyes, respectively.

In both disease groups, the average reductions were 30.4% and 30.0%. Clock-hours with greater than average reductions are in light grey for NAION and dark grey for POAG. 12 o’clock: superior; 3 o’clock: nasal; 6 o’clock: inferior; and 9 o’clock: temporal.