I don't know if this goes hand in hand with my hypo-thyroidism but in 94, my eyes dried up so severely, I had to put ointment in my eyes to lubricate them a bazillion times per day. I finally had plugs inserted in my tear ducts ~ two plugs in one eye, one in the other. It really has helped but dry winter weather dries them out. Does anybody else have this problem? Does anybody know what causes it? THANKS.