Table 3.

Comparison of preoperative and postoperative changes in CTSP between the two groups

Parameter	Mean ± Standard Deviation		P-value
	femto-LASIK	flap-off epi-LASIK
0 mm
Pre-op	574.45 ± 28.45	547.45 ± 28.34	0.381
Post-op	473.53 ± 28.38	452.47 ± 43.15	0.074
P-value	< 0.001	< 0.001
2 mm
Pre-op	584.30 ± 28.15	557.20 ± 27.87	0.418
Post-op	490.67 ± 26.29	469.95 ± 42.37	0.068
P-value	< 0.001	< 0.001
4 mm
Pre-op	614.90 ± 28.67	552.15 ± 28.76	0.431
Post-op	546.53 ± 20.97	454.89 ± 43.54	0.066
P-value	< 0.001	< 0.001
6 mm
Pre-op	668.95 ± 30.15	639.90 ± 27.30	0.531
Post-op	634.93 ± 20.40	605.47 ± 49.14	0.039
P-value	< 0.001	< 0.001
8 mm
Pre-op	752.40 ± 31.73	722.95 ± 31.84	0.889
Post-op	731.20 ± 27.52	709.42 ± 41.02	0.074
P-value	0.007	0.001

femto-LASIK femtosecond laser-assisted in situ keratomileusis; epi-LASIK epipolis laser-assisted in situ keratomileusis; CTSP corneal thickness spatial profile; Pre-op preoperative; Post-op postoperative