Table 5.

Backscattered light intensity 120 μm below the epithelium.

	SMILE (n = 30)	Femto-LASIK (n = 30)	P
	Mean (SU) ± SD	Mean (SU) ± SD
Preoperative	1062.45 ± 75.51	1051.20 ± 88.83	0.007
Week 1*	1728.90 ± 238.50	1391.40 ± 238.68
Month 1*	1491.12 ± 288.36	1296.45 ± 199.35
Month 3*	1340.46 ± 257.49	1163.16 ± 191.16
Month 6	1212.03 ± 169.92	1124.01 ± 148.23

n: number of eyes; SU: scatter units; SD: standard deviation.

*P < 0.05: the difference between the two groups in the change from baseline.