Corneal Topographic and Aberrometric Measurements Obtained with a Multidiagnostic Device in Healthy Eyes: Intrasession Repeatability

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

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