Table 2.

Intraclass correlation coefficient of orbital diameter measurements for the physical grader (a) and the VR grader (b). A value between 0.75 and 1.00 is considered good.

Model type unit	Type	Unit	ICC	95%
(a)
Twoway	Agreement	Average	ICC(A,3) = 0.995	0.978 < ICC < 0.999
Twoway	Agreement	Single	ICC(A,1) = 0.984	0.936 < ICC < 0.996
Twoway	Consistency	Average	ICC(C,3) = 0.997	0.989 < ICC < 0.999
Twoway	Consistency	Single	ICC(C,1) = 0.990	0.968 < ICC < 0.997
(b)
Twoway	Agreement	Average	ICC(A,4) = 1.000	1.000 < ICC < 1.000
Twoway	Agreement	Single	ICC(A,1) = 1.000	0.999 < ICC < 1.000
Twoway	Consistency	Average	ICC(C,4) = 1.000	1.000 < ICC < 1.000
Twoway	Consistency	Single	ICC(C,1) = 1.000	0.999 < ICC < 1.000