Comparison of the Clinical Outcomes between Combined Femtosecond Laser-Assisted In Situ Keratomileusis and Corneal Cross Linking versus Combined Small-Incision Lenticule Extraction and Corneal Cross Linking

Table 2

The differences at 1, 3, and 12 months after FS-LASIK Xtra surgery.

	UCVA						MRSE
	Preoperatively	1d		1 month	3 months		Preoperatively	1d		1 month	3 months
1d	<0.001						0.003
1 month	<0.001	0.322					0.001	1.000
3 months	<0.001	0.776		1.000			0.003	0.754		0.011
12 months	<0.001	1.000		1.000	1.000		0.002	0.331		0.007	0.899
	SimK mean			Anterior instantaneous curvature			Posterior axial curvature			CCT
	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months
1 month	<0.001			<0.001			1.000			<0.001
3 months	<0.001	0.088		<0.001	0.020		0.681	1.000		<0.001	0.427
12 months	0.017	0.531	0.556	0.023	0.280	1.000	1.000	1.000	1.000	<0.001	0.007	0.001
	K1			K2			SRI			SAI
	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months
1 month	<0.001			<0.001			1.000			0.379
3 months	<0.001	<0.001		<0.001	0.028		0.162	1.000		0.742	1.000
12 months	0.001	0.012	0.082	<0.001	0.021	0.066	1.000	1.000	0.529	1.000	1.000	1.000
	IOPcc			IOPg			CRF			CH
	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months
1 month	0.144			<0.001			0.002			0.042
3 months	0.708	1.000		0.016	1.000		0.027	1.000		0.448	0.489
12 months	1.000	1.000	0.464	0.324	0.229	0.379	0.229	0.107	0.332	0.998	0.345	1.000

UDVA = uncorrected distance visual acuity; MRSE = manifest refractive spherical equivalent; CCT = central corneal thickness; SRI = surface regularity index; SAI = surface asymmetry index; IOPcc = corneal compensated intraocular pressure; IOPg = Goldmann correlated intraocular pressure; CRF = corneal resistance factor; CH = corneal hysteresis.