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. Author manuscript; available in PMC: 2010 Nov 1.
Published in final edited form as: Prog Retin Eye Res. 2009 Jun 27;28(6):452–482. doi: 10.1016/j.preteyeres.2009.06.003

Table 1.

Categories of ROP subjects.

Category Clinical Features
No ROP No ROP ever
Mild ROP Stage 1 or 2, Zone II or III*; resolved spontaneously
Severe ROP Stage 3*; treated