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 4

Postoperative data of FS-LASIK Xtra and SMILE Xtra groups.

	1 month			3 months			12 months
	FS-LASIK Xtra	SMILE Xtra	value	FS-LASIK Xtra	SMILE Xtra	value	FS-LASIK Xtra	SMILE Xtra	value
MRSE (diopters)	−0.099 ± 0.53	−0.120 ± 0.467	0.886	−0.609 ± 0.65	−0.162 ± 0.37	0.006	−0.91 ± 0.17	−0.266 ± 0.52	0.01
UDVA (log MAR)	−0.014 ± 0.04	−0.033 ± 0.06	0.192	−0.010 ± 0.049	−0.023 ± 0.04	0.344	0.012 ± 0.06	−0.050 ± 0.04	0.186
CCT (μm)	429.25 ± 29.04	432.46 ± 24.69	0.682	436.88 ± 34.45	431.71 ± 26.26	0.562	461.5 ± 15.11	460.75 ± 8.96	0.906
K1 (diopters)	38.86 ± 1.52	39.95 ± 1.73	0.024	39.50 ± 1.55	40.18 ± 1.92	0.179	40.14 ± 0.99	41.33 ± 2.75	0.279
K2 (diopters)	38.07 ± 1.47	39.20 ± 1.84	0.023	38.65 ± 1.43	39.43 ± 1.93	0.115	39.06 ± 0.94	40.55 ± 2.98	0.215
SRI	0.32 ± 0.26	0.24 ± 0.19	0.233	0.29 ± 0.20	0.24 ± 0.15	0.324	0.19 ± 0.15	0.18 ± 0.21	0.881
SAI	0.67 ± 0.40	0.57 ± 0.45	0.415	0.57 ± 0.29	0.51 ± 0.17	0.408	0.45 ± 0.27	0.60 ± 0.17	0.196
IOPcc	13.35 ± 2.09	13.20 ± 2.22	0.800	14.33 ± 2.01	13.20 ± 1.82	0.048	13.31 ± 1.26	13.81 ± 1.12	0.416
IOPg	8.75 ± 2.37	8.75 ± 2.19	0.995	10.01 ± 2.28	8.90 ± 1.51	0.053	9.36 ± 2.46	8.64 ± 0.33	0.436
CRF	5.84 ± 1.21	6.02 ± 0.96	0.555	6.60 ± 1.30	6.16 ± 0.61	0.143	6.65 ± 1.64	6.38 ± 0.82	0.806
CH	7.43 ± 0.98	7.24 ± 1.65	0.641	7.68 ± 0.87	7.73 ± 0.78	0.849	8.01 ± 1.71	7.63 ± 0.74	0.442
SimK mean	37.85 ± 1.55	39.27 ± 1.90	0.007	38.52 ± 1.64	39.52 ± 2.05	0.068	39.52 ± 1.94	40.67 ± 2.93	0.371
Anterior instantaneous curvature	39.70 ± 1.38	39.99 ± 1.67	0.505	40.13 ± 1.45	40.21 ± 1.85	0.881	40.94 ± 1.61	41.23 ± 2.56	0.793
Posterior axial curvature	−6.54 ± 0.54	−6.59 ± 0.24	0.643	−6.44 ± 0.31	−6.61 ± 0.24	0.031	−6.39 ± 0.49	−6.63 ± 0.33	0.281

MRSE = manifest refractive spherical equivalent; UDVA = uncorrected distance visual acuity; 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. .