Not the holiday season, the heating season! If you live north of the Mason-Dixon Line and you take care of dry eye patients, you just got very busy. Why? Because furnaces all across North America went on sometime last month, and your patients have been slowly dehumidifying the air in their homes and workplaces. With that comes the “dry eye season,” as predictable in many areas as ragweed in the fall and corneal abrasions on Dec. 26.