Table 3. Dichotomous analysis of inter-rater agreement scores for the two categories of not sight impaired and any sight impairment whether severe or not.

Sample	Kappa	95% CI	Alpha	95% CI	ICC	95% CI
Overall	0.232	0.142–0.345	0.233	(−0.006 to 0.438)	0.241	0.173–0.344
Glaucoma	0.316	0.194–0.479	0.317	(0.106–0.53)	0.327	0.236–0.451
Experienced	0.28	0.094–0.274	0.170	(−0.062 to 0.39)	0.189	0.119–0.293