Table 2.

Preoperative and postoperative corneal HOA in patients who underwent corneal wavefront/topography-guided LASIK, and were divided into the AMARIS and EX500 Groups respectively

AMARIS group					EX500 group			†P
Corneal aberration (um)	Preoperative	Postoperative	Post–Pre	p	Preoperative	Postoperative	p
Coma	0.198 ± 0.108	0.529 ± 0.278	0.316 ± 0.297	< 0.001*	0.208 ± 0.113	0.331 ± 0.186	< 0.001*	< 0.001*
Spherical aberration	0.258 ± 0.081	0.507 ± 0.136	0.254 ± 0.146	< 0.001*	0.279 ± 0.116	0.412 ± 0.165	< 0.001*	0.02*
Horizontal coma (Z3−1)	− 0.074 ± 0.088	− 0.143 ± 0.243	0.051 ± 0.283	0.14	− 0.079 ± 0.091	− 0.149 ± 0.136	0.15	0.63
Vertical coma (Z31)	− 0.083 ± 0.176	− 0.409 ± 0.332	0.330 ± 0.337	< 0.001*	− 0.071 ± 0.190	− 0.231 ± 0.238	< 0.001*	< 0.001*
|Horizontal coma (Z3−1)|	0.107 ± 0.076	0.233 ± 0.182	0.124 ± 0.328	0.17	0.111 ± 0.064	0.184 ± 0.128	0.36	0.09
|Vertical coma(Z31)|	0.177 ± 0.117	0.444 ± 0.267	0.531 ± 0.457	< 0.001*	0.168 ± 0.113	0.243 ± 0.181	< 0.001*	< 0.001*