Table 3

Changes of blood flow perfusion of different layers at different time points

Changes of blood flow perfusion (%)5th minute15th minute15th minute
(Ref: post-reading)(Ref: post-reading)(Ref: pre-reading)
Superficial retinal
 4k lux, mean (95% CI)0.7 (0.1 to 1.3)0.3 (−0.1 to 0.8)0.2 (−0.4 to 0.7)
 10k lux, mean (95% CI)−0.2 (−0.9 to 0.5)−0.4 (−1.0 to 0.2)−0.2 (−0.8 to 0.4)
 P value*0.0580.0640.322
Deep retinal
 4k lux, mean (95% CI)0.3 (−0.2 to 0.8)0.1 (−0.3 to 0.5)0.4 (0.0 to 0.8)
 10k lux, mean (95% CI)−0.1 (−0.6 to 0.4)−0.2 (−0.7 to 0.4)0.1 (−0.3 to 0.6)
 P value*0.2150.5280.347
Choroidal
 4k lux, mean (95% CI)0.1 (−0.2, to 0.5)−0.4 (−0.7 to –0.1)−0.3 (−0.7 to 0.0)
 10k lux, mean (95% CI)−0.4 (−0.8 to 0.0)−0.3 (−0.7 to 0.0)−0.1 (−0.5 to 0.3)
 P value*0.0510.8360.346
  • *T-tests for two independent samples were applied to compare the change of blood flow perfusion between two groups of sunlight exposure.