Repeatability assessment of anterior segment measurements in myopic patients using an anterior segment OCT with placido corneal topography and agreement with a swept-source OCT

Table 4 Agreement between MS-39 and CASIA SS-1000 in biometric measurements

Parameter	Mean difference ± SD	P	95% LoA
K_f (D)	-0.029 ± 0.260	0.086	-0.54 to 0.48
K_s (D)	-0.007 ± 0.330	0.749	-0.65 to 0.64
K_m (D)	-0.024 ± 0.221	0.102	-0.46 to 0.41
TCT (µm)	-4.893 ± 3.331	< 0.0001	-11.4 to 1.6
CCT (µm)	-4.001 ± 3.385	< 0.0001	-10.6 to 2.6

SD = standard deviation; LoA = limits of agreement; K_f = central corneal radius of the flat meridian; K_s = central corneal radius of the steep meridian; K_m = mean central corneal radius; TCT = thinnest corneal thickness; CCT = central corneal thickness

ISSN: 1471-2415