Table 3.

Classification of severity of 23 visual fields with altitudinal defects from training set

		Field parameters
Qualitative severity (as classified by panel)	n	Average dB loss within defect	95% CI	Average number points in defect	95% CI
Mild	1	6.2		5
Moderate	5	18.2	12.9 to 23.5	25	24.3 to 25.7
Severe	17	27.4	26.3 to 28.5	26	25.8 to 26.2