It directly correlates to when CFS started for me in the states. I had CFS like episodes travelling around the world a few times which I mostly recovered from, but it then came back in full force after a weird cold a year after India. Dry eyes came with this cold, and so did the fatigue, the dry eyes went away and then slowly came back and got much worse. This is off topic, maybe I should start a thread about it, but I use Tranquileyes goggles at night, which are like wet sponges over your eyes (don't fix the problem at night, but at least keep your eyes from getting so dry they get damaged), and Oasis Tears Plus eyedrops, which are by far the best eyedrops for dry eyes in my experience. Both can be found at The Dry Eye Shop I'm suspicious that the dry eyes are from not sleeping well, because I used to get dry eyes when I stayed up all night or didn't get much sleep. But that's just a guess.