Table 3.

Comparison between the preoperative and postoperative DRS analyzer results for the FS-LASIK and SMILE groups

	FS-LASIK			SMILE
	Preoperative	Postoperative	p value	Preoperative	Postoperative	p value
ACD (mm)	3.29 ± 0.26	3.26 ± 0.26	< 0.001	3.30 ± 0.24	3.23 ± 0.25	< 0.001
Average K (D)
Anterior	42.97 ± 1.51	40.28 ± 1.87	< 0.001	42.71 ± 1.43	39.91 ± 1.67	< 0.001
Posterior	−6.18 ± 0.25	−6.22 ± 0.26	0.001	−6.13 ± 0.23	−6.16 ± 0.23	0.104
Anterior K (D)
Flat	42.06 ± 1.52	39.61 ± 1.91	< 0.001	42.00 ± 1.42	39.25 ± 1.69	< 0.001
Steep	43.89 ± 1.60	40.96 ± 1.86	< 0.001	43.41 ± 1.53	40.56 ± 1.72	< 0.001
Posterior K (D)
Flat	−5.98 ± 0.24	−6.01 ± 0.24	0.012	−5.97 ± 0.22	−5.96 ± 0.23	0.218
Steep	−6.38 ± 0.28	−6.43 ± 0.30	0.006	−6.23 ± 1.17	−6.37 ± 0.27	0.094
MPE (μm)	7.46 ± 2.59	8.56 ± 2.97	< 0.001	7.11 ± 2.61	7.86 ± 2.78	0.001
BFSR (mm)
Anterior	7.88 ± 0.27	8.33 ± 0.34	< 0.001	7.92 ± 0.25	8.43 ± 0.31	< 0.001
Posterior	6.54 ± 0.25	6.53 ± 0.26	0.370	6.57 ± 0.23	6.54 ± 0.25	0.154

DRS dual rotating Scheimpflug, FS-LASIK femtosecond laser-assisted laser in situ keratomileusis, SMILE small incision lenticule extraction, CCT central corneal thickness, ACD anterior chamber depth, K keratometric power, D diopters, MPE maximal posterior elevation, BFSR best-fit sphere radius

*Significant at p = 0.01 (=0.05/5), using a Bonferroni adjustment to control for the 5 tests conducted