OCT Biometry (B-OCT): A New Method for Measuring Ocular Axial Dimensions

Table 1

Intraobserver repeatability results for B-OCT using REVO NX based on three measurements taken by 2 clinicians in a sample of 50 eyes.

Parameter	Observer	Mean ± SD	Sw	TRT	CoV (%)	ICC
AXL (mm)	1st	23.93 ± 0.80	0.01	0.03	0.04	1.000
	2nd	23.93 ± 0.80	0.01	0.03	0.04	1.000
CCT (μm)	1st	555.44 ± 26.56	2.01	5.58	0.36	0.994
	2nd	555.43 ± 27.08	1.75	4.85	0.32	0.996
ACD (mm)	1st	3.59 ± 0.28	0.01	0.04	0.38	0.998
	2nd	3.59 ± 0.28	0.01	0.03	0.34	0.998
LT (mm)	1st	4.02 ± 0.22	0.02	0.05	0.45	0.993
	2nd	4.02 ± 0.22	0.01	0.04	0.35	0.996

AXL: axial length; CCT: central corneal thickness; ACD: anterior chamber depth; LT: lens thickness; Sw: within-subject SD; TRT, test-retest repeatability (2.77 Sw); CoV: within-subject coefficient of variation; ICC: intraclass correlation coefficient.