TableĀ 1

Severity of retinopathy classification

ZoneStagePlusSeverity categoryReference
AP-ROP5
13No plusType 16
13PreplusThis study
13Plus disease6
12Plus disease6
11Plus disease6
23Plus disease6
22Plus disease6
21Plus diseaseType 2 plusThis study
33Plus disease
32Plus disease
31Plus disease
12Preplus
11Preplus
23Preplus
22Preplus
21Preplus
33Preplus
32Preplus
31Preplus
12No plusType 26
11No plus
23No plus
22No plusMild7
21No plus
33No plus7
32No plus
31No plus7
4Partial retinal detachment5
5Total retinal detachment5
  • AP-ROP, aggressive posterior retinopathy of prematurity.