I have dry eyes all day, and at night (especially at night) ?? very little tears.?

I had this same problem, I work in a climate controlled room due to the equipment and used to have a ton of problems with dry eyes. My eye doctor switched me to CIBA visions Air Optix lens(silicon lens), and that helped some. He also determined I had some minor allergies, and started me on Zaditor(over the counter drops you use twice a day). Not sure if this will help but it definately made my eyes a lot happier.