Comparison of Corneal Densitometry and Visual Quality after Small Incision Lenticule Extraction (SMILE) and Laser Epithelial Keratomileusis (LASEK): One-Year Comparative Study

Table 5

Univariate analysis between the change of corneal densitometry after refractive surgery and type of operation, age, SE, UCVA, endothelial cell, MCT, and LT/AD.

Variable	Postoperative year 1
	Group		Age		SE		UCVA		Endothelial cell		MCT		LT/AD
	Anterior layer
0-2 mm	-0.767	<0.001	-0.089	0.399	0.125	0.233	-0.057	0.592	-0.049	0.643	0.434	<0.001	0.316	0.002
2-6 mm	-0.812	<0.001	-0.065	0.539	0.054	0.606	-0.088	0.404	-0.001	0.995	0.537	<0.001	0.407	<0.001
6-10 mm	-0.448	<0.001	-0.020	0.849	0.018	0.864	0.010	0.927	-0.108	0.307	0.247	0.018	0.244	0.019
Central layer
0-2 mm	-0.243	0.019	0.102	0.331	0.168	0.109	0.052	0.623	0.006	0.958	0.408	<0.001	0.022	0.837
2-6 mm	-0.423	<0.001	0.045	0.669	-0.005	0.961	-0.020	0.849	-0.068	0.520	0.454	<0.001	0.224	0.032
6-10 mm	-0.213	0.041	-0.016	0.877	-0.041	0.701	0.074	0.484	-0.128	0.225	0.222	0.033	0.160	0.128
Posterior layer
0-2 mm	-0.060	0.571	0.203	0.052	0.038	0.721	0.156	0.138	0.117	0.265	0.130	0.217	0.030	0.777
2-6 mm	-0.147	0.163	0.188	0.072	-0.054	0.612	0.065	0.537	0.137	0.194	0.173	0.099	0.133	0.206
6-10 mm	-0.182	0.082	0.118	0.262	-0.013	0.902	0.106	0.313	-0.021	0.842	0.132	0.211	0.145	0.169
Total layer
0-2 mm	-0.510	<0.001	0.088	0.405	0.135	0.201	0.031	0.770	0.033	0.754	0.407	<0.001	0.201	0.055
2-6 mm	-0.668	<0.001	0.049	0.641	0.031	0.766	-0.056	0.596	0.040	0.702	0.510	<0.001	0.350	0.001
6-10 mm	-0.347	0.001	0.035	0.741	-0.006	0.951	0.047	0.658	-0.097	0.357	0.250	0.016	0.205	0.050

SE: spherical equivalent; LT/AD: lenticule thickness/ablation depth; MCT: minimum corneal thickness; UCVA: uncorrected distance visual acuity.