I read a paper here:

http://www.ncbi.nlm.nih.gov/pubmed/22370669

Tlucek PS, Grace SF, Anderson MP, Siatkowski RM. Effect of the oxygen saturation target on clinical characteristics of early- versus late-onset retinopathy of prematurity. J AAPOS. 2012 Feb;16(1):70-4. PubMed PMID: 22370669.

...

Maximal severity of disease after treatment, including retinal detachment frequency was similar...independent of the oxygen protocol...

Now I am getting more confused...

But confused on à higher level ?!

Evidence Based Confusion !!!!

Interesting - I had never read about the distinction of early and late ROP..