Repeatability and reproducibility of a new spectral-domain optical coherence tomography biometer and agreement with swept-source optical coherence tomography based biometer

Table 4 Results of reproducibility analysis of the Colombo IOL measurements in normal subjects

Parameter	Mean ± SD	S_w	TRT	CoV (%)	ICC (95% CI)
AL (mm)	25.51 ± 1.14	0.00	0.01	0.02	1.000 (1.000–1.000)
CCT (μm)	531.41 ± 29.52	0.90	2.49	0.17	0.999 (0.998–0.999)
AQD (mm)	3.14 ± 0.31	0.02	0.06	0.70	0.995 (0.992–0.997)
ACD (mm)	3.67 ± 0.31	0.02	0.06	0.60	0.995 (0.992–0.997)
LT (mm)	3.81 ± 0.34	0.03	0.08	0.72	0.994 (0.989–0.996)
Kf (D)	43.12 ± 1.37	0.09	0.24	0.20	0.996 (0.994–0.998)
Ks (D)	44.14 ± 1.51	0.08	0.21	0.18	0.997 (0.996–0.998)
Km (D)	43.63 ± 1.41	0.07	0.19	0.16	0.998 (0.996–0.999)
AST (D)	1.02 ± 0.6	0.09	0.24	8.43	0.980 (0.967–0.987)
J₀ (D)	− 0.38 ± 0.37	0.05	0.13	− 11.77	0.985 (0.977–0.991)
J₄₅ (D)	0.14 ± 0.2	0.04	0.10	26.70	0.964 (0.942–0.978)
WTW (mm)	12.63 ± 0.54	0.09	0.24	0.70	0.973 (0.957–0.984)
PD (mm)	5.93 ± 1.05	0.34	0.95	5.77	0.900 (0.842–0.937)

AL = axial length; CCT = central corneal thickness; AQD = aqueous humor depth; ACD = anterior chamber depth; LT = lens thickness; Kf = flattest meridian keratometry; Ks: steepest meridian keratometry; Km = mean keratometry; AST = corneal astigmatism; J₀ = astigmatism parameters J₀; J₄₅ = astigmatism parameters J₄₅; WTW = white to white; PD = pupil diameter; SD = standard deviation; Sw = within-subject standard deviation; TRT = test–retest repeatability coefficient (2.77 × Sw); CoV = coefficient of variation; ICC = intraclass correlation coefficient; CI = confidence interval

ISSN: 2326-0254