Table 3.

Categories of Visual Field Progression Status for Oversampling and Undersampling Methods

	Category I	Category II	Category III	Category IV	Category V	Category VI
Definition	−3 < MD0 −3 ≤ ΔMD	−3 < MD0 −6 < ΔMD < −3	−3 < MD0 ΔMD ≤ −6	−3 ≥ MD0 −3 ≤ ΔMD	−3 ≥ MD0 −6 < ΔMD < −3	−3 ≥ MD0 ΔMD ≤ −6
Interpretation	Healthy stable	Healthy with mild worsening	Healthy with severe worsening (converting)	Stable patient	Patient with mild worsening	Patient with severe worsening

ΔMD = change in mean deviation; MD₀ = baseline visual field mean deviation.