I've been having real problems with my eyes. I find, by the afternoon, I am struggling to see properly. Yesterday, I had an inspiration. I wondered if my eyes were dehydrating in the afternoon and evening and so trouble me even though I am on new prescription glasses (old frame) due to vaping.
My inspiration was triggered by this link which was one of the waves I surfed on yesterday - The water Cure
Here is a link debunking it - The Water Cure Debunked
So yesterday I drank water - all day. I hate water. But it was worth it! Yesterday my eyes were fine!
If you vape - drink, drink, drink!