Why so many more eye drops post cataract surgery in US than Europe

In many european countries a singe intra eye injection of cefuroxime is used instead of multiple topical antibiotic drops.There seems to be no doubt in the eye surgery literature that this "intracameral" injection is very effective reducing the risk of infection by some 4 or 5 fold and seeminly make the use of post op antibiotic eye drops unnecessary So why in Europe and not in US? It may have to do with the lack of availablity of an intra ocular injection form of cefuroxime in US and the drug company profit from dispensing lots of eye drops.