Comparison of Toric and Spherical Orthokeratology Lenses in Patients with Astigmatism

Table 3

Repeatability and reproducibility of orthokeratology lens decentration measurements.

		SD (mm)	COR (％)	Cronbach’s alpha	ICC (95％ CI)
For each observer	Observer 1	0.030 ± 0.019	7.25	0.995	0.987 (0.979–0.992)
	Observer 2	0.030 ± 0.016	7.75	0.996	0.987 (0.979–0.992)
Between observers		0.024 ± 0.022	6.51	0.993	0.993 (0.989–0.996)

SD : standard deviation; COV : coefficient of repeatability; ICC : intraclass correlation coefficient.