[null and void]

And I repeat:

Oxygen levels that are too high can cause blindness in preemies.

[ScaniaBoy]

Yes, that's what is still taught to all medical students. However, it takes time to develop retrolental fibroplasia (”oxygen blindness”) and this paper is concerned with resuscitation, so minutes instead of days.

Also, it is not certain that it is the high oxygen in itself that causes the malformation of the blood vessels in the eye. It may actually be caused by a too sudden reduction of the oxygen partial pressure when the premature infant is removed from the oxygen enriched environment.

See this paper:

Retinopathy Of The Newborn Is Due To Hypoxia Not Oxygen Toxicity