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.
1 Eyes. 2  Inflammation of the surface of the eye (scleritis) may result in dry, gritty-feeling eyes or pain in the eyes. 3  Lungs. 4  Inflammation of the membrane sac surrounding the lungs may cause pain and difficult breathing. 5  Bumps (nodules) may also develop in lung tissue. 6  Heart.