The National Eye Institute in 1999 sponsored a multicenter ... Stage 2 ROP with plus disease Zone II, Stage 3 ROP without plus disease Zone II, Stage 3 ROP with plus disease but fewer than 5 ...

The infant is predisposed to phase 1 ROP due ... Stage 2 A ridge of scar tissue that arises in the region of the demarcation line that has both height and width. Stage 3 Severely abnormal blood ...