Table 1 Using stage, zone, and presence of “plus disease” to classify ROP into type 1 and type 2
From: Retinopathy of prematurity: from oxygen management to molecular manipulation
Zone I | Zone II | Zone III | |||
|---|---|---|---|---|---|
Stage 1 | ⊕ = Type 1 | ⊖ = Type 2 | Examination intervals based on plus / pre-plus disease status | Examination intervals based on plus / pre-plus disease status | |
Stage 2 | ⊕ = Type 1 | ⊖ = Type 2 | ⊕ = Type 1 | Examination intervals based on pre-plus disease status | Examination intervals based on plus / pre-plus disease status |
Stage 3 | ⊕ = Type 1 | ⊖ = Type 1 | ⊕ = Type 1 | ⊖ = Type 2 | Examination intervals based on plus / pre-plus disease status |