Table 1. Intraobserver repeatability of ocular parameters measured by Tomey OA-2000 biometer (n = 108).

Parameter	Observer	Mean ± SD	CoV (%)	Sw	2.77Sw	ICC
AL (mm)	1st	24.56 ± 1.30	0.034	0.013	0.037	1.000
	2nd	24.56 ± 1.30	0.035	0.011	0.030	1.000
CCT (μm)	1st	520.48 ± 31.63	0.668	5.08	14.06	0.991 (0.988–0.994)
	2nd	521.05 ± 31.69	0.591	4.75	13.17	0.993 (0.990–0.995)
ACD (mm)	1st	3.59 ± 0.32	0.426	0.020	0.057	0.999 (0.998–0.999)
	2nd	3.58 ± 0.32	0.385	0.016	0.045	0.999 (0.998–0.999)
LT (mm)	1st	3.72 ± 0.29	0.651	0.055	0.152	0.990 (0.987–0.993)
	2nd	3.73 ± 0.30	0.686	0.063	0.175	0.987 (0.982–0.991)
Kf (D)	1st	42.81 ± 1.44	0.141	0.070	0.200	0.999 (0.999–0.999)
	2nd	42.81 ± 1.41	0.140	0.077	0.214	0.999 (0.999–0.999)
Ks (D)	1st	43.84 ± 1.61	0.220	0.134	0.372	0.998 (0.997–0.998)
	2nd	43.84 ± 1.63	0.183	0.134	0.372	0.998 (0.997–0.998)
Km (D)	1st	43.32 ± 1.48	0.174	0.055	0.152	1.000 (0.999–1.000)
	2nd	43.32 ± 1.49	0.113	0.070	0.196	0.999 (0.999–1.000)
PD (mm)	1st	5.53 ± 0.88	5.298	0.363	1.001	0.943 (0.922–0.960)
	2nd	5.49 ± 0.87	4.885	0.322	0.893	0.954 (0.936–0.967)
CD (mm)	1st	11.88 ± 0.39	0.829	0.197	0.547	0.916 (0.885–0.940)
	2nd	11.87 ± 0.39	0.575	0.170	0.472	0.936 (0.912–0.954)

AL: axial length, CCT: central corneal thickness, ACD: anterior chamber depth, LT: lens thickness, Kf: flat keratometry, Ks: steep keratometry, Km: mean keratometry, PD: pupil diameter, CD: white to white, D: diopter, SD: standard deviation, CoV: coefficient of variance, Sw: within-subject standard deviation, ICC: intraclass correlation coefficient.