Table 8 Coding of presenting distance visual acuity (ICD revised changes to definition of blindness)

0 = Mild or no visual impairment: equal to or better than: 6/18

1 = Moderate visual impairment: worse than: 6/18/Equal to or better than: 6/60

2 = Severe visual impairment: worse than: 6/60/Equal to or better than: 3/60

3 = Blindness: worse than: 3/60/equal to or better than: 1/60

4 = Blindness: worse than: 1/60/equal to or better than light perception

5 = Blindness: no light perception

9 = Undetermined or unspecified