Table 7.

Change of total high order wavefront aberration (μm) before and after tablet computer watching was compared

	Treatment Group
	DA9301			Placebo
	n = 26			n = 24
	Before video stimulus	After video stimulus	p-value	Before video stimulus	After video stimulus	p-value
Baseline (Visit 2)
Mean (SD)	2.33 (2.05)	2.32 (1.90)	0.451	2.51 (2.46)	2.61 (2.62)	0.856
Median (Min, Max)	1.55 (0.31,7.08)	1.7 (0.23,6.50)		1.49 (0.36,9.14)	1.4 (0.35,9.97)
Visit 3
Mean (SD)	2.18 (1.83)	2.27 (1.93)	0.715	2.49 (2.36)	2.53 (2.33)	0.633
Median (Min, Max)	1.53 (0.42,5.95)	1.7 (0.27,6.92)		1.92 (0.27,7.69)	1.8 (0.36,7.74)

p-value obtained from one-sided paired t-test. If p-value < 0.05, then significant