Reliability of Ocular Aberration Measurements in Children with Moderate and Low Myopia under Scotopic Conditions

Table 2

The intrasession and intersession repeatability of ocular aberration measured in natural scotopic circumstances.

		Average	Intrasession difference		Difference/average (%)	95% LOA	ICC
Total RMS	Session 1	3.78 ± 1.24	−0.07	0.464	1.85	[−1.31, 1.17]	0.883
	Session 2	3.71 ± 1.20	−0.16	0.031	4.31	[−1.12, 0.80]	0.922
	Intersession	3.74 ± 1.18	−0.08	0.390	2.14	[−1.28, 1.12]	0.877
LOA total RMS	Session 1	3.73 ± 1.27	0.00	0.998	0.00	[−1.46, 1.46]	0.847
	Session 2	3.65 ± 1.23	−0.09	0.388	2.47	[−1.49, 1.31]	0.852
	Intersession	3.69 ± 1.21	−0.08	0.425	2.17	[−1.38, 1.22]	0.863
HOA total RMS	Session 1	0.33 ± 0.16	−0.01	0.654	3.03	[−0.31, 0.29]	0.668
	Session 2	0.35 ± 0.15	0.00	0.951	0.00	[−0.38, 0.38]	0.426
	Intersession	0.34 ± 0.14	0.01	0.503	2.94	[−0.23, 0.25]	0.712
Defocus	Session 1	3.64 ± 1.20	−0.07	0.644	1.92	[−2.01, 1.87]	0.719
	Session 2	3.63 ± 1.18	−0.15	0.038	4.13	[−1.09, 0.79]	0.923
	Intersession	3.64 ± 1.14	−0.01	0.941	0.27	[−1.43, 1.41]	0.824
Astigmatism	Session 1	0.59 ± 0.40	0.00	0.987	0.00	[−0.38, 0.38]	0.900
	Session 2	0.57 ± 0.35	−0.03	0.137	5.26	[−0.33, 0.27]	0.914
	Intersession	0.58 ± 0.37	−0.02	0.246	3.45	[−0.28, 0.24]	0.943
Coma	Session 1	0.24 ± 0.14	−0.02	0.403	8.33	[−0.28, 0.24]	0.682
	Session 2	0.25 ± 0.13	−0.03	0.128	12.00	[−0.31, 0.25]	0.540
	Intersession	0.24 ± 0.13	0.01	0.566	4.17	[−0.19, 0.21]	0.738
Trefoil	Session 1	0.15 ± 0.08	0.00	0.933	0.00	[−0.14, 0.14]	0.663
	Session 2	0.14 ± 0.08	0.00	0.662	0.00	[−0.12, 0.12]	0.735
	Intersession	0.14 ± 0.07	0.00	0.700	0.00	[−0.12, 0.12]	0.724
Spherical	Session 1	0.07 ± 0.07	0.01	0.295	14.29	[−0.09, 0.11]	0.728
	Session 2	0.07 ± 0.07	0.00	0.632	0.00	[−0.14, 0.14]	0.555
	Intersession	0.07 ± 0.06	0.00	0.845	0.00	[−0.10, 0.10]	0.700
Secondary	Session 1	0.06 ± 0.04	0.00	0.874	0.00	[−0.10, 0.10]	0.537
	Session 2	0.06 ± 0.04	−0.01	0.185	16.67	[−0.11, 0.09]	0.483
	Intersession	0.06 ± 0.04	0.00	0.527	0.00	[−0.08, 0.08]	0.631
MTF@5cpd	Session 1	0.55 ± 0.18	0.00	0.831	0.00	[−0.30, 0.30]	0.722
	Session 2	0.54 ± 0.18	0.04	0.033	7.41	[−0.20, 0.28]	0.811
	Intersession	0.54 ± 0.17	−0.01	0.570	1.85	[−0.19, 0.17]	0.875
MTF@10cpd	Session 1	0.28 ± 0.13	−0.01	0.358	3.57	[−0.21, 0.19]	0.723
	Session 2	0.26 ± 0.12	0.02	0.320	7.69	[−0.24, 0.28]	0.574
	Intersession	0.27 ± 0.12	−0.01	0.334	3.70	[−0.17, 0.15]	0.781
MTF@15cpd	Session 1	0.18 ± 0.09	0.00	0.894	0.00	[−0.24, 0.24]	0.339
	Session 2	0.17 ± 0.07	0.01	0.256	5.88	[−0.15, 0.17]	0.561
	Intersession	0.18 ± 0.07	−0.02	0.087	11.11	[−0.16, 0.12]	0.617
MTF@20cpd	Session 1	0.13 ± 0.06	−0.01	0.237	7.69	[−0.15, 0.13]	0.480
	Session 2	0.12 ± 0.05	0.01	0.552	8.33	[−0.09, 0.11]	0.595
	Intersession	0.12 ± 0.05	−0.01	0.102	8.33	[−0.09, 0.07]	0.764
MTF@25cpd	Session 1	0.10 ± 0.05	−0.01	0.333	10.00	[−0.11, 0.09]	0.560
	Session 2	0.10 ± 0.04	0.01	0.146	10.00	[−0.09, 0.11]	0.538
	Intersession	0.10 ± 0.04	0.00	0.443	0.00	[−0.06, 0.06]	0.734
MTF@30cpd	Session 1	0.08 ± 0.04	0.00	0.762	0.00	[−0.08, 0.08]	0.645
	Session 2	0.08 ± 0.04	0.01	0.131	12.50	[−0.07, 0.09]	0.563
	Intersession	0.08 ± 0.04;	0.00	0.324	0.00	[−0.06, 0.06]	0.701

Note: : values of the intrasession difference; 95% LOA: 95% limits of agreement; ICC: intraclass correlation coefficient. Asterisk indicates statistical significance.