Why Cold Temperatures Increase Eye Dryness

Why Cold Temperatures Increase Eye Dryness DALLAS, March 2011 — If your eyes tend to feel dryer during winter weather, wearing goggles might help. A recent study found that a temperature less than 30 degrees Celsius (86 degrees Fahrenheit) on your eye and eyelid causes the oily, outer layer of your eye's tear film to thicken and stiffen, so that it can't spread well across the eye. This oily substance, called the meibum, is necessary to prevent evaporation of the tears on your eye's surface.