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 3

The differences at 1, 3, and 12 months after SMILE Xtra surgery.

	UCVA						MRSE
	Preoperatively	1d		1 month	3 months		Preoperatively	1d		1 month	3 months
1d	<0.001						<0.001
1 month	<0.001	0.039					<0.001	0.001
3 months	<0.001	0.059		1.000			<0.001	0.003		0.094
12 months	<0.001	0.043		1.000	1.000		<0.001	0.314		0.331	1.000
	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	0.002		<0.001	0.048		0.385	0.518		<0.001	0.306
12 months	<0.001	0.001	1.000	<0.001	<0.001	1.000	0.044	1.000	1.000	<0.001	<0.001	<0.001
	K1			K2			SRI			SAI
	Preoperatively	1 month	3months	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months
1 month	<0.001			<0.001			0.548			0.830
3 months	<0.001	0.025		<0.001	0.001		1.000	1.000		0.611	1.000
12 months	<0.001	0.002	0.858	<0.001	0.001	1.000	1.000	0.562	1.000	0.217	1.000	1.000
	IOPcc			IOPg			CRF			CH
	Preoperatively	1 month	3months	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months	Preoperatively	1 month	3 months
1 month	0.073			0.001			0.001			0.058
3 months	1.000	0.745		0.049	1.000		0.009	1.000		0.138	1.000
12 months	0.156	0.953	1.000	0.003	1.000	0.663	0.021	1.000	0.873	0.220	1.000	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.