Table 2.

Descriptive statistics for the Bland-Altman plots (see figure 3) for the right eyes of 278 participants (one outlier was removed). SDs (s) in dioptres (D) are provided for both the means as well as for the differences (of repeated measures per eye). The quantity $s_d$ is the SD of the differences of repeated measures per eye.³⁰ Coefficients of repeatability ($\mathrm{C}\mathrm{R}=1.96\times s_d$, unit is D) are also given. Units are dioptres throughout except for the intraclass correlation coefficients (ICC) which are unitless

n=278		Stigmatic coefficients (FI=M)	Ortho-antistigmatic coefficients (FJ =J0)	Oblique-antistigmatic coefficients (FK=J45)
OD	${\displaystyle \stackrel{-}{M}}$ (s)	−1.94 (2.04)	0.05 (0.37)	−0.01 (0.24)
	${\displaystyle {\overline{X}}_d(s_d)}$	−0.02 (0.55)	0.02 (0.30)	0.02 (0.29)
	SE for ${\displaystyle {\stackrel{-}{X}}_d}$	0.03	0.02	0.02
	(LLoA; ULoA)	(−1.11; 1.10)	(−0.55; 0.60)	(−0.54; 0.57)
	95% LoA width	2.21	1.16	1.12
	SE for LoA	0.06	0.03	0.03
	CR	1.08	0.58	0.56
	ICC	0.96	0.72	0.47

CR, coefficients of repeatability; ICC, intraclass correlation coefficient; LLoA, Lower limit of agreement; LoA, Limits of agreement; ULoA, Upper limit of agreement .