Table 3 Corneal high-order aberrations before and at 3 months after topography guided LASIK.

From: Clinical outcomes of topography-guided femtosecond laser-assisted in situ keratomileusis after multifocal intraocular lens implantation

 

Preoperative

Postoperative

P valuea

Corneal aberrations

Total high-order aberrations (RMSh)

0.74 ± 0.37

0.54 ± 0.30

0.012b

Spherical aberration (\({{\varvec{Z}}}_{4}^{0}\))

0.16 ± 0.15

0.072 ± 0.19

0.013b

Coma (RMS)

0.46 ± 0.26

0.24 ± 0.16

0.001b

Vertical coma (\({{\varvec{Z}}}_{ 3}^{-1}\))

 − 0.0095 ± 0.38

0.050 ± 0.22

0.781

Horizontal coma (\({{\varvec{Z}}}_{3}^{1}\))

0.00028 ± 0.36

 − 0.0010 ± 0.17

0.502

Trefoil (RMS)

0.36 ± 0.28

0.28 ± 0.25

0.108

Oblique trefoil (\({{\varvec{Z}}}_{ 3}^{-3}\))

 − 0.10 ± 0.29

0.024 ± 0.28

0.032b

Horizontal trefoil (\({{\varvec{Z}}}_{3}^{3}\))

 − 0.039 ± 0.34

0.072 ± 0.19

0.001b

  1. Corneal aberrations were measured across a 6.0-mm diameter scan site.
  2. RMSh high-order aberration root mean square, RMS root mean square.
  3. aWilcoxon signed ranks test.
  4. bStatistically significant.
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