Dry Eye Disease
"I purchased Systane Ultra by Alcon a couple of days ago. It did not help my dry and red eyes. I made my eyes itch worse than ever, they were really red too. It might have something to do with the preservative used, I don&#039;t know for sure. I went back to using Oculac by Alcon instead, it seems it has the same manufacturer but it is cheaper and a little thinner."