Corneal Spherical Aberration and Corneal Asphericity after Small Incision Lenticule Extraction and Femtosecond Laser-Assisted LASIK

Table 2

Spherical aberrations of the anterior surface, the posterior surface, and the total cornea in SMILE and FS-LASIK (μm).

Groups	Preoperative	1 month	6 months	value
SMILE
Anterior surface	0.25 ± 0.07	0.51 ± 0.13	0.45 ± 0.11	<0.001
Posterior surface	−0.15 ± 0.02	−0.16 ± 0.03^†	−0.16 ± 0.03	<0.001
Total cornea	0.21 ± 0.08	0.48 ± 0.15	0.42 ± 0.12	<0.001
FS-LASIK
Anterior surface	0.23 ± 0.07	0.62 ± 0.22	0.55 ± 0.19	<0.001
Posterior surface	−0.16 ± 0.02	−0.16 ± 0.03^†	−0.17 ± 0.02	<0.001
Total cornea	0.18 ± 0.07	0.60 ± 0.25	0.53 ± 0.21	<0.001

SMILE: small incision lenticule extraction; FS-LASIK: femtosecond laser-assisted laser in situ keratomileusis. Significantly different from preoperative data at . ^†Significantly different from preoperative data at .