The National Motor Freight ClassificationÂ®. The National Motor Freight ClassificationÂ® (NMFCÂ®) is a standard that provides a comparison of commodities moving in interstate, intrastate and foreign commerce. It is similar in concept to the groupings or grading systems that serve many other industries.
Dry eyes Symptoms of dry eyes include a gritty sensation, pain, light sensitivity, eye redness, burning, and stinging. Sjogren's syndrome Sjogren's syndrome is an autoimmune disorder that most often causes dry eyes and dry mouth.
Watery eyes may also be caused by irritation or injury to the eye, such as a scratch or other damage. Comstock Images/Comstock/Getty Images. Watery eyes can actually be a symptom of dry eyes. In this case, the irritation of dry eyes causes the tear ducts to overcompensate and produce more tears than necessary.