Table 4.

Backscattered light intensity 30 µm below Bowman's membrane.

	SMILE (n = 30)	Femto-LASIK (n = 30)	P
	Mean (SU) ± SD	Mean (SU) ± SD
Preoperative	1116.45 ± 85.59	1099.35 ± 91.44	0.012
Week 1*	1706.85 ± 238.23	1396.80 ± 236.52
Month 1*	1464.66 ± 252.36	1299.78 ± 164.70
Month 3*	1370.61 ± 247.23	1161.00 ± 173.61
Month 6	1215.99 ± 122.58	1144.98 ± 151.74

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

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