Table 1.

Bland Altman Alalysis of repeated measurments. N = number of eyes, COR = coefficient of repeatability, L LOA = Lower limit of agreement, U LOA = Upper limit of agreement, ICC = Intraclass correlation, RR = Relative repeatability (COR/Mean), ARC = anterior radius of curvature, A = staging index for ARC, PRC = posterior radius of curvature, B = staging index for PRC, Pachymin = the thinnest pachymetry, C = staging index for pachymetry, Kmax = steepest radius of curvature, Distapex = distance from apex to thinnest location, Progression Avg = index of average progression, ARTmax = Ambrósio relational thickness maximum, DF = deviation of front surface elevation difference, DB = deviation of back surface elevation difference, D p = deviation of pachymetric progression, DT = deviation of thinnest point, DA = deviation of ARTMax/Ambrósio relational thickness maximum, D = D-index , ISV = index of surface variance, IVA = index of vertical asymmetry, KI = keratoconus index, CKI = central keratoconic index, IHA = index of height asymmetry, IHD = index of height decentration, RMI = minimum radius of sagittal curvature.

	N	Mean	SD	Mean Difference	SD	COR	L LOA	U LOA	ICC	RR (%)
ARC	317	7.003	0.598	0.003	0.054	0.106	− 0.103	0.110	0.996	1.514
A	317	1.689	1.292	− 0.003	0.122	0.238	− 0.242	0.235	0.996	14.091
PRC	317	5.311	0.613	0.004	0.067	0.131	− 0.127	0.134	0.994	2.467
B	317	2.507	1.388	− 0.004	0.183	0.358	− 0.362	0.354	0.991	14.280
Pachymin	317	473.730	41.188	0.341	5.748	11.266	− 10.926	11.607	0.990	2.378
C	317	1.424	0.783	− 0.008	0.121	0.238	− 0.245	0.230	0.988	16.713
Kmax	316	52.447	6.068	− 0.004	0.472	0.926	− 0.930	0.922	0.997	1.766
Front Elevation	317	16.820	10.938	− 0.060	2.108	4.131	− 4.191	4.071	0.982	24.560
Back Elevation	317	40.880	22.386	0.079	4.052	7.942	− 7.864	8.021	0.984	19.428
Distapex	317	0.867	0.309	0.003	0.139	0.273	− 0.270	0.275	0.899	31.488
Progression Avg	315	1.836	0.604	− 0.003	0.118	0.023	− 0.233	0.228	0.981	1.253
Artmax	316	198.910	91.754	0.367	22.571	44.240	− 43.873	44.607	0.970	22.241
DF	317	7.291	5.878	0.021	1.109	2.174	− 2.153	2.196	0.982	29.818
DB	317	6.108	4.993	0.001	1.000	1.960	− 1.959	1.961	0.980	32.089
DP	316	6.249	3.966	− 0.036	0.780	1.529	− 1.565	1.493	0.981	24.468
DT	317	2.222	1.591	− 0.011	0.221	0.434	− 0.445	0.423	0.990	19.531
DA	317	2.641	0.837	− 0.004	0.206	0.404	− 0.408	0.400	0.970	15.297
D	317	6.725	3.642	0.001	0.413	0.810	− 0.809	0.812	0.994	12.908
ISV	316	69.918	36.673	− 0.153	2.539	4.977	− 5.128	4.825	0.998	7.118
IVA	317	0.780	0.458	− 0.002	0.042	0.082	− 0.084	0.080	0.996	10.513
KI	317	1.187	0.125	0.001	0.015	0.029	− 0.029	0.030	0.993	2.443
CKI	316	1.034	0.074	0.000	0.005	0.011	− 0.011	0.011	0.997	1.064
IHA	317	28.549	23.988	− 1.205	17.597	34.489	− 35.694	33.285	0.731	120.806
IHD	315	0.105	0.068	0.000	0.006	0.011	− 0.011	0.011	0.997	10.476
RMI	315	6.516	0.707	0.002	0.049	0.096	− 0.094	0.098	0.998	1.473