Table 3

Comparisons of corneal aberrations between the SMILE and FS-LASIK groups

Parameters	SMILE group		FS-LASIK group		P values
Parameters	Mean	SD	Mean	SD	P values
Preoperation
HOAs	0.44	0.22	0.41	0.12	0.448
Spherical	0.22	0.09	0.22	0.08	0.963
Coma	0.15	0.16	0.15	0.08	0.895
Postoperation
HOAs	0.98	0.41	1.04	0.36	0.457
Spherical	0.41	0.16	0.59	0.18	<0.001
Coma	0.21	0.17	0.21	0.14	0.918
Induced
HOAs	0.54	0.40	0.63	0.37	0.293
Spherical	0.19	0.16	0.37	0.19	<0.001
Coma	0.09	0.15	0.10	0.12	0.832

SMILE， small incision lenticule extraction; HOAs, higher-order aberrations.
HOAs, higher order aberrations; FS-LASIK, femtosecond laser-assisted laser in situ keratomileusis; SMILE, small incision lenticule extraction.