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

Table 3 Inter-device agreement of corneal astigmatism in dioptric vector space

Parameter	Mean ± SD		Mean difference ± SD	P	95% LoA
	SS-OCT	Placido + SD-OCT			Lower, upper	Span
Anterior cornea (D)
J0	− 0.02 ± 0.39	− 0.01 ± 0.38	− 0.01 ± 0.25	0.71	− 0.49, 0.51	1.00
J45	0.11 ± 0.22	0.13 ± 0.21	0.02 ± 0.20	0.31	− 0.37, 0.41	0.78
Total cornea (D)
J0	0.13 ± 0.39	0.11 ± 0.36	− 0.02 ± 0.18	0.38	− 0.36, 0.33	0.69
J45	0.11 ± 0.20	0.12 ± 0.20	0.02 ± 0.15	0.31	− 0.29, 0.32	0.61
Posterior cornea (D)
J0	0.14 ± 0.06	0.12 ± 0.15	− 0.02 ± 0.15	0.11	− 0.33, 0.28	0.61
J45	0.00 ± 0.04	0.01 ± 0.06	− 0.01 ± 0.05	0.20	− 0.11, 0.09	0.20

SD = standard deviation; D = diopter; LoA = limits of agreement; SD-OCT = spectral-domain optical coherence tomography; SS-OCT = swept-source optical coherence tomography

ISSN: 2326-0254