I have this thing where sometimes after a long-haul flight and I get out in the open air, its like my eyeballs have dried out our something. There's a burning sensation and if feels like my eyelids are sticking to the cornea. It is actually pretty painful, and my tearducts start working over time to compensate for whatever the irritation is. I haven't really figured out what is happening, but I know I don't like it. Today while standing on the curb, I could hardly keep my eyes open or see anything and tears were streaming down my face. I think the woman standing next to me thought I was getting all emotional about being in Canada.