Clinical Outcomes Comparison of Combined Small Incision Lenticule Extraction with Collagen Cross-Linking Versus Small Incision Lenticule Extraction Only

Table 3

K-avg: Keratometry average; K-max: Keratometry maximum; TPP: thinnest point pachymetry; maximum posterior elevation.

	1 month	6 months	12 months	24 months
SMILE: K-avg (D)	38.37 ± 1.83	38.42 ± 1.77	38.28 ± 1.74	38.74 ± 1.76
SMILE Xtra: K-avg (D)	38.91 ± 1.61	38.33 ± 1.50	38.67 ± 1.92	38.35 ± 1.85
value	0.232	0.837	0.418	0.485
SMILE: K-max (D)	41.00 ± 5.87	41.12 ± 4.66	41.27 ± 4.40	41.64 ± 3.53
SMILE Xtra: K-max (D)	41.83 ± 6.02	41.21 ± 3.76	41.74 ± 3.56	41.50 ± 2.77
value	0.590	0.340	0.464	0.264
SMILE: TPP (microns)	403.83 ± 35.51	407.94 ± 37.05	414.03 ± 36.28	408.29 ± 38.75
SMILE Xtra: TPP (microns)	399.40 ± 40.82	394.45 ± 38.00	402.16 ± 39.52	402.22 ± 37.18
value	0.664	0.192	0.188	0.600
SMILE: MPE (microns)	12.65 ± 5.85	12.47 ± 7.33	11.13 ± 4.39	10.14 ± 3.85
SMILE Xtra: MPE (microns)	13.22 ± 5.86	14.81 ± 7.02	11.54 ± 5.15	11.00 ± 4.72
value	0.705	0.239	0.747	0.523