Influence of overnight orthokeratology lens fitting decentration on corneal topography reshaping

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

\( {C}_n^m \)	PCCB	OCCP	PCCP	OCCP vs. PCCB	PCCP vs. PCCB	PCCP vs. OCCP
\( {C}_n^m \)	(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^†
3^rd -order RMS	0.32 ± 0.17	0.93 ± 0.49	1.07 ± 0.83	0.000^*	0.000^*	0.038^†
4^th -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^*

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
^*P < 0.001 (paired t test), significant statistical significance
^†P < 0.05(paired t test), statistical significance

ISSN: 2326-0254