Immature Retina and Stage 1
Immature Retina: the earliest abnormality in the premature retina is immature retina only, characterized ophthalmoscopically by an avascular retinal periphery, often with vasoconstriction (Figure 2A).
Stage 1 ROP: a thin white line lies with the plane of the retina demarcating the junction of the vascular and avascular retina (Figure 2B , blue arrow)
