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.
Eye pain that occurs on the surface may be a scratching, burning, or itching sensation. Surface pain is usually caused by irritation from a foreign object, infection, or trauma. Often, this type of eye pain is easily treated with eye drops or rest. Eye pain that occurs deeper within the eye may feel aching, gritty, stabbing, or throbbing.