I also have a problem with dry eyes since I quit drinking nearly 4 months ago. I was drinking large quantities of water several times a day to try and flush the toxins out of my system as well as rehydrate my body. My doctor explained to me that drinking large amounts of water is great for flushing the toxins but to hydrate I need to keep water with me at all times and take 3 or 4 sips through out the day to allow it to absorb and not just run right through me.
I am not a doctor and I do not mean to suggest this is medical advice. It is always good to see a doctor when you're having problems.