Journal of Ophthalmology

Clinical Study

Small Incision Lenticule Extraction (SMILE) for Moderate and High Myopia: Seven-Year Outcomes of Refraction, Corneal Tomography, and Wavefront Aberrations

Table 3

Preoperative versus postoperative corneal wavefront aberrations for a 5 mm pupil.


Parameters	Pre	1 month	1 year	5 years	7 years

Corneal (front)
SA	0.13 ± 0.05	0.16 ± 0.08	0.13 ± 0.16	0.15 ± 0.07	0.14 ± 0.05	0.414
Coma (vertical)	−0.03 ± 0.13	−0.31 ± 0.26^a	−0.35 ± 0.22^a	−0.31 ± 0.22^a	−0.34 ± 0.21^a	<0.001
Coma (horizontal)	−0.01 ± 0.04	0 ± 0.16	−0.02 ± 0.14	−0.03 ± 0.15	−0.08 ± 0.14	0.102
Trefoil (vertical)	0.01 ± 0.06	0.05 ± 0.06	0.04 ± 0.08	−0.01 ± 0.05	−0.01 ± 0.04	0.135
Trefoil (horizontal)	0.01 ± 0.03	0.05 ± 0.08	0.01 ± 0.06	0.01 ± 0.06	0.02 ± 0.07	0.282
RMS HOA	0.21 ± 0.02	0.45 ± 0.06^a	0.45 ± 0.05^a	0.43 ± 0.04^a	0.43 ± 0.05^a	<0.001

Corneal (back)
SA	−0.08 ± 0.02	−0.08 ± 0.02	−0.08 ± 0.02	−0.08 ± 0.02	−0.09 ± 0.01^b	0.001
Coma (vertical)	−0.02 ± 0.03	0 ± 0.03^a	0 ± 0.03^a	0 ± 0.03^a	0 ± 0.03	<0.001
Coma (horizontal)	0.01 ± 0.02	0.01 ± 0.03	0.01 ± 0.03	0.01 ± 0.03	0.01 ± 0.03	0.244
Trefoil (vertical)	0.01 ± 0.02	0 ± 0.03	0 ± 0.02	−0.02 ± 0.03	−0.01 ± 0.04	0.066
Trefoil (horizontal)	0 ± 0.02	0.01 ± 0.02	0.02 ± 0.04	0.02 ± 0.03	0.01 ± 0.04	0.432
RMS HOA	0.10 ± 0.02	0.11 ± 0.02	0.11 ± 0.02	0.11 ± 0.02	0.12 ± 0.03	0.033

Corneal (total)
SA	0.11 ± 0.05	0.14 ± 0.09	0.11 ± 0.07	0.13 ± 0.08	0.11 ± 0.05	0.359
Coma (vertical)	−0.04 ± 0.13	−0.35 ± 0.38^a	−0.38 ± 0.23^a	−0.34 ± 0.23^a	−0.38 ± 0.22^a	<0.001
Coma (horizontal)	0 ± 0.05	0.01 ± 0.17	−0.01 ± 0.14	−0.03 ± 0.14	−0.09 ± 0.14	0.055
Trefoil (vertical)	0.02 ± 0.07	0.05 ± 0.07	0.05 ± 0.10	−0.03 ± 0.07^b	−0.02 ± 0.05^b	<0.001
Trefoil (horizontal)	0.01 ± 0.04	0.07 ± 0.09	0.03 ± 0.07	0.04 ± 0.07	0.03 ± 0.07	0.247
RMS HOA	0.21 ± 0.07	0.49 ± 0.25^a	0.48 ± 0.21^a	0.46 ± 0.18^a	0.46 ± 0.21^a	<0.001

HOAs = higher-order aberrations; SA = spherical aberration; ^avs. pre values of statistical significance (); ^bvs. 1-month values of statistical significance (); ^cvs. 1-year values of statistical significance (). Data are presented as mean ± SD.