My dr. prescribed this because of not only my dry eyes but my filamentary keratitis. It is supposed to help the filaments not attach to the eye. I read all the scary reactions to this drug and had an anxiety attack before I ever used it! I have been using it 3 weeks now though I opted to do just once a day to be sure I would not get reactions. Yes there is some burning but most eye drops in dry eyes produce burning. Yes there is blurriness but that subsides after about 1.5 hours. I tilt my head back and press on inner eye corners as instructions say to not get runoff after inserting. None of my vials were empty. There is adequate liquid for a large drop in each eye plus some left over. Best of all in these 2 weeks it has helped my filamentary keratitis. Read all the comments but give it a try.