Table 4. The comparisons of TBUT between the SMILE and FS-LASIK group postoperatively.

Time	n	1mo	3mo	6mo	1y	2y	3y	F	P
SMILE	78	8.56±1.04	9.59±1.10	10.01±1.04	10.22±0.98	10.38±1.00	10.44±1.04	36.776	0.000
FS-LASIK	65	4.35±1.32	5.95±0.91	9.65±0.96	10.06±1.09	10.11±1.05	10.37± 0.96	390.530	0.000
t	-	20.921	21.295	1.877	0.906	1.617	0.395	-	-
P	-	0.000	0.000	0.081	0.367	0.108	0.693	-	-

SMILE: Small-incision lenticule extraction; FS-LASIK: Femtosecond laser-assisted LASIK.