Table 2

Study categorisation of visual fields by BD8 terminology

CategoryDefinitionBD8 terminology
1Field contracted to ⩽10°Very contracted, especially if the contraction is in the lower part of the field
2Field contracted to:
⩽10° in the lower part of the field,
>10° but ⩽15° in the upper part of the field
3Field contracted to >10° but ⩽15°Very/marked contracted
4Field contracted to >15° but ⩽20°Moderate contraction
5Gross field defect—for example, hemianopiaGross field defect
6Field not in the above categoriesFull field