“…In 13 countries at least one additional risk factor/sickness criteria for screening was clearly defined. 25,26,29,31,33,35,37,40,41,[43][44][45][46] In these 13 guidelines and in four further documents, a paediatrician or neonatologist could initiate screening if they considered a newborn to be at risk of ROP if they fell outside the GA and BW criteria. 30,32,36,39 In five countries, 27,28,34,38,42 all indications for screening were clearly defined.…”