Table 2.

Comparison of the UCVA of the three groups (x̅ ± s, LogMAR).

Group	Number of subjects	Pre-op	2 weeks after surgery	1 month post-op	3 months after operation
SMILE group	200	0.57 ± 0.12	0.91 ± 0.22	1.01 ± 0.24	1.03 ± 0.25
FS-LASIK group	200	0.58 ± 0.14	0.95 ± 0.25	1.02 ± 0.22	1.01 ± 0.23
SBK group	200	0.56 ± 0.17	0.93 ± 0.24	1.00 ± 0.23	1.01 ± 0.25
F	-	0.950	1.420	0.380	0.450
P value	-	0.386	0.242	0.686	0.638