I disagree with walgreensunder, I personally have gotten eye floaters after dehydration and after drinking about half a cup of water I they disappear. I realized this when I went to the optomatrist and told him about the 3 eye floaters in my eye. He told me how they were caused and to relax my eyes. I didn't know what to do after that. They wouldn't go away. 2 days later a weird rainbow projection came into my eye, and I didn't know what that was, but I knew it wasn't good. So I thought of things I haven't done in a while, and one of them was drink water because I forgot to buy month. After drinking water they all vanished. This hasn't only happened once. Every time I don't drink water for 2 days an eye floater will pop into my eye. I ended up finding this thread because I wanted to see if people knew about it, or was I the only one. So I have had experience with this, and I can confirm that dehydration does cause eye floaters.