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Table 3 Baseline and postoperative 3mm and 6mm higher order aberrations in cases of high myopia treated with SMILE, femto-LASIK, and PRK

From: Matched comparison of corneal higher order aberrations induced by SMILE to femtosecond assisted LASIK and to PRK in correcting moderate and high myopia: 3.00mm vs. 6.00mm

Index Pupil diameter Surgical method Pre-operative 3 M follow-up 12 M follow-up One-year change P-value
Total coma (µm) 6-mm SMILE 0.20 ± 0.09 0.52 ± 0.27 0.56 ± 0.28 0.36 ± 0.28a 0.535b
0.289c
Femto-LASIK 0.21 ± 0.09 0.50 ± 0.22 0.54 ± 0.22 0.33 ± 0.19a
PRK 0.21 ± 0.10 0.48 ± 0.24 0.52 ± 0.26 0.31 ± 0.24a
3-mm SMILE 0.09 ± 0.06 0.14 ± 0.11 0.16 ± 0.12 0.05 ± 0.11a 0.233b
0.823c
Femto-LASIK 0.10 ± 0.07 0.16 ± 0.06 0.16 ± 0.09 0.06 ± 0.08a
PRK 0.09 ± 0.05 0.13 ± 0.08 0.14 ± 0.10 0.05 ± 0.10a
Total SA (µm) 6-mm SMILE 0.21 ± 0.07 0.46 ± 0.15 0.45 ± 0.15 0.24 ± 0.14a 0.006b
< 0.001c
Femto-LASIK 0.23 ± 0.05 0.56 ± 0.12 0.53 ± 0.12 0.30 ± 0.13a
PRK 0.22 ± 0.06 0.61 ± 0.21 0.60 ± 0.21 0.38 ± 0.21a
3-mm SMILE 0.06 ± 0.03 0.06 ± 0.03 0.08 ± 0.04 0.02 ± 0.04 0.106b
0.722c
Femto-LASIK 0.06 ± 0.03 0.08 ± 0.04 0.07 ± 0.03 0.01 ± 0.04
PRK 0.07 ± 0.03 0.06 ± 0.05 0.07 ± 0.04 -0.00 ± 0.06
Total trefoil (µm) 6-mm SMILE 0.14 ± 0.07 0.16 ± 0.08 0.17 ± 0.08 0.03 ± 0.09 0.426b
0.130c
Femto-LASIK 0.17 ± 0.10 0.22 ± 0.15 0.21 ± 0.16 0.04 ± 0.16
PRK 0.13 ± 0.08 0.19 ± 0.11 0.18 ± 0.10 0.05 ± 0.12a
3-mm SMILE 0.13 ± 0.09 0.21 ± 0.12 0.23 ± 0.10 0.10 ± 0.15a < 0.001b
0.006c
Femto-LASIK 0.15 ± 0.09 0.16 ± 0.11 0.18 ± 0.13 0.03 ± 0.14
PRK 0.13 ± 0.09 0.16 ± 0.09 0.15 ± 0.11 0.02 ± 0.14
  1. a Within sub-group statistically significant change
  2. b Comparison of one-year change in indices between SMILE and femto-LASIK
  3. c Comparison of one-year change in indices between SMILEand PRK
  4. months, SA spherical aberration, PRK photorefractive keratectomy, SMILE small incision lenticule extraction, femto-LASIK femtosecond-assisted laser in-situ keratomileusis