. 2017 Jan 4;2017:2149145. doi: 10.1155/2017/2149145

Table 3.

Summary of the intrasession repeatability outcomes for the corneal aberrometric measurements obtained by means of the VX120 system.

	Overall mean (SD) Overall median (range)	S _w	Pr	2.77 × S_w	ICC (range 95% CI)
HOA RMS (µm)	0.25 (0.11)	0.048	0.093	0.13	0.901
HOA RMS (µm)	0.23 (0.06 to 0.73)	0.048	0.093	0.13	(0.864 to 0.930)
Primary coma RMS (Z₃^±1)	0.14 (0.08)	0.031	0.062	0.09	0.916
Primary coma RMS (Z₃^±1)	0.13 (0.03 to 0.49)	0.031	0.062	0.09	(0.885 to 0.941)
Primary trefoil RMS (Z₃^±3)	0.11 (0.07)	0.036	0.070	0.10	0.845
Primary trefoil RMS (Z₃^±3)	0.10 (0.02 to 0.42)	0.036	0.070	0.10	(0.787 to 0.890)
Primary spherical aberration Zernike term (Z₄⁰)	0.10 (0.08)	0.021	0.041	0.06	0.958
Primary spherical aberration Zernike term (Z₄⁰)	0.08 (0.02 to 0.63)	0.021	0.041	0.06	(0.942 to 0.970)
Secondary astigmatism RMS (Z₄^±2)	0.04 (0.03)	0.014	0.027	0.04	0.887
Secondary astigmatism RMS (Z₄^±2)	0.03 (0.01 to 0.19)	0.014	0.027	0.04	(0.844 to 0.919)
Quadrafoil RMS (Z₄^±4)	0.06 (0.03)	0.025	0.048	0.07	0.689
Quadrafoil RMS (Z₄^±4)	0.05 (0.01 to 0.21)	0.025	0.048	0.07	(0.571 to 0.689)
Secondary coma RMS (Z₅^±1)	0.02 (0.01)	0.008	0.015	0.02	0.679
Secondary coma RMS (Z₅^±1)	0.01 (0.00 to 0.06)	0.008	0.015	0.02	(0.557 to 0.772)
Secondary trefoil RMS (Z₅^±3)	0.02 (0.01)	0.010	0.020	0.03	0.564
Secondary trefoil RMS (Z₅^±3)	0.02 (0.00 to 0.06)	0.010	0.020	0.03	(0.398 to 0.690)
Pentafoil RMS (Z₅^±5)	0.04 (0.02)	0.018	0.036	0.05	0.473
Pentafoil RMS (Z₅^±5)	0.04 (0.01 to 0.16)	0.018	0.036	0.05	(0.273 to 0.625)
Secondary spherical aberration Zernike term (Z₆⁰)	−0.01 (0.01)	0.007	0.014	0.02	0.724
Secondary spherical aberration Zernike term (Z₆⁰)	−0.01 (−0.06 to 0.04)	0.007	0.014	0.02	(0.620 to 0.804)
Tertiary astigmatism RMS (Z₆^±2)	0.01 (0.01)	0.007	0.013	0.02	0.845
Tertiary astigmatism RMS (Z₆^±2)	0.01 (0.00 to 0.12)	0.007	0.013	0.02	(0.786 to 0.890)
Secondary quadrafoil RMS (Z₆^±4)	0.02 (0.01)	0.011	0.021	0.03	0.617
Secondary quadrafoil RMS (Z₆^±4)	0.02 (0.01 to 0.10)	0.011	0.021	0.03	(0.471 to 0.727)
Hexafoil RMS (Z₆^±6)	0.04 (0.02)	0.017	0.032	0.05	0.590
Hexafoil RMS (Z₆^±6)	0.04 (0.01 to 0.12)	0.017	0.032	0.05	(0.434 to 0.708)
Tertiary coma RMS (Z₇^±1)	0.01 (0.01)	0.005	0.011	0.01	0.516
Tertiary coma RMS (Z₇^±1)	0.01 (0.00 to 0.03)	0.005	0.011	0.01	(0.332 to 0.656)
Tertiary trefoil RMS (Z₇^±3)	0.01 (0.01)	0.006	0.013	0.02	0.424
Tertiary trefoil RMS (Z₇^±3)	0.01 (0.00 to 0.04)	0.006	0.013	0.02	(0.205 to 0.590)
Secondary pentafoil RMS (Z₇^±5)	0.02 (0.01)	0.009	0.018	0.03	0.623
Secondary pentafoil RMS (Z₇^±5)	0.02 (0.00 to 0.09)	0.009	0.018	0.03	(0.480 to 0.732)
Heptafoil RMS (Z₇^±7)	0.03 (0.01)	0.011	0.022	0.03	0.633
Heptafoil RMS (Z₇^±7)	0.03 (0.01 to 0.08)	0.011	0.022	0.03	(0.493 to 0.739)

SD, standard deviation; HOA, high order aberrations; RMS, root mean square.