If it is true that...

Premature babies are often given extra oxygen, which tends to cause vasoconstriction by displacing carbon dioxide

and

Supplemental oxygen without carbon dioxide causes vasoconstriction, reducing the tissues' supply of glucose as well as oxygen and damages the retina when combined with too much light

Then it must be true that...

Retinopathy of prematurity has blinded tens of thousands of people

If it is true that...

The fetus accumulates a very large amount of iron and absorbs melatonin from the maternal circulation

and

Prolactin is sometimes elevated in the newborn

and

Premature babies are often given extra oxygen, which tends to cause vasoconstriction by displacing carbon dioxide

and

Synthetic glucocorticoids are often given to premature babies, adding to the risk of retinal damage

Then it must be true that...

Retinopathy of prematurity has blinded tens of thousands of people