Table 5.

Comparison of dioptre difference between normal visual acuity and myopic subjects before and after the experiment.

Group	Dioptre difference before and after experiment in normal vision group (D)	Dioptre difference before and after experiment in myopia group (D)	F	P
Outdoor exercise (normal vision vs. myopia)	−0.29 ± 0.09	−0.35 ± 0.21	11.74	0.266
Outdoor control (normal vision vs. myopia)	−0.39 ± 0.19	−0.51 ± 0.15	2.26	0.017*
Indoor exercise (normal vision vs. myopia)	−0.41 ± 0.16	−0.56 ± 0.27	6.93	0.022*
Indoor control (normal vision vs. myopia)	−0.56 ± 0.16	−0.67 ± 0.30	7.39	0.145

*means P < 0.05, **means P < 0.01.