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Table 2 The correlations between lens fitting decentration and the change of Zernike coefficients in (PCCP – PCCB) and (PCCP − OCCP)

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

\( {C}_n^m \) PCCP − PCCB PCCP − OCCP
Radial Horizontal Vertical Radial Horizontal Vertical
\( {C}_3^{-1} \) / / 0.693* −0.296 / 0.904*
\( {C}_3^1 \) −0.379* 0.730* / −0.396* 0.901* /
\( {C}_4^0 \) 0.531* / / 0.449* / /
\( {C}_4^2 \) / −0.301 0.275 / / /
\( {C}_5^1 \) / 0.369* / / 0.340* /
  1. Abbreviations: PCCP = Pupil-centered corneal Zernike coefficients of post-treatment; PCCB = Pupil-centered corneal Zernike coefficients of baseline/pre-treatment; OCCP = OK-lens-centered corneal Zernike coefficients of post-treatment
  2. *P < 0.001 (Pearson correlation (r) test), significant statistical significance
  3. P < 0.05 (Pearson correlation (r) test), statistical significance