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.
Personal Health; When Eyes Have That Sandpaper Grit Feeling. TEARS may seem like simple, salty little drops produced naturally in great profusion when provoked by intense emotion or an irritant in the eye. But tears are neither simple nor simply produced. And for more than 10 million Americans who suffer from dry eye syndrome, tear production is so inadequate or the tears evaporate so quickly that their eyes constantly feel gritty and irritated, as if scratched by sand with every blink.