The precision and agreement of corneal thickness and keratometry measurements with SS-OCT versus Scheimpflug imaging

Table 6 The difference and agreement for corneal power measurements between CASIA swept-source optical coherence tomography and Pentacam Scheimpflug imaging in children

Device Pairings	Mean ± SD	P Value	95% LoA
Km	0.21 ± 0.15	< 0.001	−0.09 to 0.51
J₀	0.00 ± 0.12	0.849	− 0.23 to 0.23
J₄₅	0.03 ± 0.15	0.116	− 0.26 to 0.31
Nasal 2 mm	0.33 ± 0.27	< 0.001	− 0.21 to 0.87
Superior 2 mm	0.32 ± 0.39	< 0.001	−0.45 to 1.08
Temporal 2 mm	0.00 ± 0.26	0.966	−0.51 to 0.52
Inferior 2 mm	0.14 ± 0.32	< 0.001	−0.48 to 0.77
Nasal 5 mm	−0.01 ± 0.22	0.797	− 0.44 to 0.42
Superior 5 mm	−0.01 ± 0.43	0.876	−0.86 to 0.84
Temporal 5 mm	0.00 ± 0.22	0.875	−0.42 to 0.43
Inferior 5 mm	−0.15 ± 0.27	< 0.001	− 0.68 to 0.37

Keratometric data are in units of diopter (D); Mean ± SD = Mean ± Standard deviation generated by paired T-test; 95% LoA = 95% limits of agreement

ISSN: 2326-0254