Skip to main content

Advertisement

Table 1 Analysis of corneal Zernike coefficients in PCCB, OCCP and PCCP with aperture size of 4 mm in diameter

From: Influence of overnight orthokeratology lens fitting decentration on corneal topography reshaping

\( {C}_n^m \) PCCB OCCP PCCP OCCP
vs.
PCCB
PCCP
vs.
PCCB
PCCP
vs.
OCCP
(mean ± standard deviation) (μm) (Paired t test)
\( {C}_2^0 \) 75.57 ± 2.40 70.96 ± 2.68 71.13 ± 2.83 0.000* 0.000* 0.095
\( {C}_3^{-1} \) −0.09 ± 0.21 0.01 ± 0.65 −0.28 ± 0.81 0.106 0.021 0.011
\( {C}_3^1 \) 0.11 ± 0.18 0.41 ± 0.65 −0.42 ± 0.87 0.000* 0.000* 0.000*
\( {C}_4^{-2} \) −0.00 ± 0.03 −0.02 ± 0.12 − 0.04 ± 0.28 0.209 0.180 0.452
\( {C}_4^0 \) 0.30 ± 0.06 0.34 ± 0.26 0.67 ± 0.40 0.126 0.000* 0.000*
\( {C}_4^2 \) −0.03 ± 0.05 −0.00 ± 0.18 0.04 ± 0.29 0.109 0.007 0.118
\( {C}_5^{-1} \) 0.00 ± 0.03 −0.04 ± 0.12 −0.01 ± 0.22 0.000* 0.504 0.176
\( {C}_5^1 \) 0.01 ± 0.04 −0.01 ± 0.11 −0.07 ± 0.24 0.051 0.001* 0.028
3rd -order RMS 0.32 ± 0.17 0.93 ± 0.49 1.07 ± 0.83 0.000* 0.000* 0.038
4th -order RMS 0.32 ± 0.06 0.45 ± 0.22 0.80 ± 0.43 0.000* 0.000* 0.000*
High orders RMS 0.48 ± 0.14 1.12 ± 0.49 1.47 ± 0.90 0.000* 0.000* 0.000*
  1. Abbreviations: PCCB = Pupil-centered corneal Zernike coefficients of baseline/pre-treatment; OCCP = OK-lens-centered corneal Zernike coefficients of post-treatment; PCCP = Pupil-centered corneal Zernike coefficients of post-treatment
  2. *P < 0.001 (paired t test), significant statistical significance
  3. P < 0.05(paired t test), statistical significance