My doctor told me I needed to use preservative-free eye drops. I used to use Retaine but found they didn't help my dry eyes enough. These are much better. The ampoules are easily reclosable, so you can use all of the product without wasting it.
I thought at first this gonna be great eye drop since the manufacturer the big brand for contact lenses. But unfortunately this eye drop make my eyes sting and bit swollen afterward. Won’t repurchase for sure