Sarah
                    
                    
                    
                    
                    
                    
                    
                        
                        
                        Marilyn,    Finally, someone that can concur with  my mysterious illness!  I also have the  dry eyes at night and rarely ever during  the day.  I am 50 and have had the dry  eyes for 3 years.  I have been tested   for autoimmune diseases, Lupus, Sjogrens  etc.  The doctors say AGE!   I have also  thought that maybe my eyes do not close   at night.  Do you have the problem when   you are away from home? My eyes are   much better when I travel.  Have you   found a cure?  My doctor is trying to   get me into a local studyHave you ever   considered your heating system?  One of   my eye doctors had a patient that had a   gas leak under his house.  He had been   treating him for 2 years for dry eyes.    Sarah