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 3 Repeatability analysis of biometric measurements provided by MS-39

8Parameter	Bonferroni whirection (P)			Bland-Altman [mean difference (95%LoA)]
8Parameter	1st vs. 2nd	1st vs. 3rd	2nd vs. 3rd	1st vs. 2nd	1st vs. 3rd	2nd vs. 3rd
K_f (D)	0.5675	1.0000	1.0000	0.01(-0.20 to 0.22)	0.00(-022 to 0.22)	-0.01(-0.23 to 0.22)
K_s (D)	0.1891	0.9929	1.0000	-0.01(-0.23 to 0.21)	-0.01(-0.29 to 0.27)	0.00(-0.25 to 0.26)
K_m (D)	1.0000	1.0000	1.0000	0.00(-0.17 to 0.17)	0.00(-0.20 to 0.19)	0.00(-0.19 to 0.19)
TCT (µm)	0.1075	1.0000	1.0000	-0.1(-2.3 to 2.0)	-0.1(-2.8 to 2.6)	0.1(-2.4 to 2.6)
CCT (µm)	0.7150	0.0972	0.6944	-0.1(-1.7 to 1.6)	-0.1(-2.2 to 1.9)	-0.1(-2.1 to 2.0)
ACD (mm)	0.9098	0.1404	0.9675	0.00(-0.02 to 0.02)	0.00(-0.02 to 0.03)	0.00(-0.02 to 0.02)
CV (mm³)	1.0000	0.1510	0.1722	-0.01(-0.57 to 0.56)	-0.04(-0.57 to 0.50)	-0.03(-0.43 to 0.38)
CD (mm)	1.0000	1.0000	1.0000	0.00(-0.12 to 0.12)	-0.01(-0.23 to 0.22)	0.00(-0.19 to 0.19)

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; ACD = anterior chamer depth; CV = corneal volume; CD = corneal diameter

ISSN: 1471-2415