Table 1. Tear cytokines in different exposure groups.

IL = interleukin; TNF = tumor necrosis factor. pvalues were Wilcoxon signed-rank test.

	Post-exposure 0 hour	Post-exposure 2 hours	Post-exposure 4 hours	Post-exposure 0 hour vs. 2 hours (p Value)	Post-exposure 0 hourr vs. 4 hours (p Value)	Post-exposure 2 hour vs. 4 hours (p Value)
IL-8 pg/mL	71.3±10.3	381.5±109.1	631.1±147.5	0.031*	0.031*	0.031*
IL-17 pg/mL	356.2±43.4	342.6±51.6	643.5±159.7	0.22	0.031*	0.031*
TNF-α pg/mL	901.5±104.5	1496.2±284.5	2120.3+718.7	0.063	0.031*	0.063

*p <0.05