Comparison of corneal aberrations from anterior segment swept source OCT versus Placido-topography combined spectral domain OCT in cataract patients

Georgiev, Stefan; Ruiss, Manuel; Dana-Fisus, Andreea; Leitgeb, Rainer A.; Findl, Oliver

doi:10.1186/s40662-023-00348-z

Eye and Vision

Table 2 Inter-device agreement of corneal aberration measurements (5 mm zone; pupil centered)

From: Comparison of corneal aberrations from anterior segment swept source OCT versus Placido-topography combined spectral domain OCT in cataract patients

Parameter	Mean difference ± SD	P*	95% LoA
			Lower, upper	Range
Anterior cornea (μm)
Z(2, − 2) Oblique astigmatism	0.03 ± 0.20	0.16	− 0.37, + 0.43	0.80
Z(2, + 2) WTR/ATR astigmatism	0.01 ± 0.29	0.71	− 0.62, + 0.65	1.27
Z(3, − 3) Oblique trefoil	0.00 ± 0.10	0.55	− 0.19, + 0.18	0.37
Z(3, − 1) Vertical coma	− 0.05 ± 0.15	0.003	− 0.34, + 0.25	0.59
Z(3, + 1) Horizontal coma	0.01 ± 0.11	0.38	− 0.21, + 0.23	0.44
Z(3, + 3) Horizontal trefoil	0.00 ± 0.09	0.59	− 0.18, + 0.17	0.35
Z(4,0) Spherical aberration	− 0.02 ± 0.05	< 0.001	− 0.11, + 0.08	0.19
HOA RMS	0.02 ± 0.10	0.42†	− 0.18, + 0.21	0.39
Total cornea (μm)
Z(2, − 2) Oblique astigmatism	0.02 ± 0.20	0.16	− 0.37, + 0.41	0.78
Z(2, + 2) WTR/ATR astigmatism	− 0.03 ± 0.20	0.71	− 0.46, + 0.42	0.88
Z(3, − 3) Oblique trefoil	0.00 ± 0.09	0.48	− 0.19, + 0.17	0.36
Z(3, − 1) Vertical coma	− 0.04 ± 0.15	0.003	− 0.33, + 0.25	0.58
Z(3, + 1) Horizontal coma	0.01 ± 0.11	0.38	− 0.20, + 0.22	0.42
Z(3, + 3) Horizontal trefoil	− 0.01 ± 0.11	0.59	− 0.22, + 0.20	0.42
Z(4,0) Spherical aberration	− 0.01 ± 0.05	< 0.001	− 0.11, + 0.08	0.19
HOA RMS	0.03 ± 0.13	0.04†	− 0.22, + 0.28	0.50
Posterior cornea (μm)
Z(2, − 2) Oblique astigmatism	− 0.01 ± 0.07	0.23†	− 0.14, + 0.12	0.26
Z(2, + 2) WTR/ATR astigmatism	− 0.03 ± 0.20	< 0.001†	− 0.42, + 0.36	0.77
Z(3, − 3) Oblique trefoil	0.00 ± 0.04	0.67†	− 0.08, + 0.07	0.15
Z(3, − 1) Vertical coma	0.01 ± 0.02	< 0.001†	− 0.03, + 0.05	0.08
Z(3, + 1) Horizontal coma	0.01 ± 0.01	0.13†	− 0.03, + 0.03	0.06
Z(3, + 3) Horizontal trefoil	0.00 ± 0.06	0.49†	− 0.12, + 0.11	0.23
Z(4,0) Spherical aberration	0.01 ± 0.02	< 0.001†	− 0.04, + 0.04	0.08
HOA RMS	0.01 ± 0.06	0.03†	− 0.10, + 0.12	0.22

SD-OCT = spectral-domain optical coherence tomography; SS-OCT = swept-source optical coherence tomography; SD = standard deviation; LoA = limits of agreement; WTR = with-the-rule; ATR = against-the-rule; HOA = higher order aberration; RMS = root mean square
*One sided t test, significant at P < 0.05
†Wilcoxon signed rank test, significant at P < 0.05. P values indicated in bold refer to statistically significant results

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ISSN: 2326-0254

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