almost reached significanceP = 0.051
The mean total retinal thickness of the 500 mW/cm 2 group as a whole was 15.6 ± 6.9 μm thinner than baseline, a difference that almost reached significance ( P = 0.051), and the ONL thickness was 8.4 ± 3.7 μm thinner than baseline, a value that was statistically significant ( P < 0.05).