So if a truck's GVWR is 10,000 pounds, that's the most the manufacturer and government have certified the truck to possibly weigh with fuel, passengers, and cargo. These classes exist for safety regulation, commercial designation, and registration purposes.
More serious causes of eye redness include infections. Infections can occur in different structures of the eye and typically produce additional symptoms such as pain, discharge, or changes in your vision. Infections that can cause eye redness include: inflammation of the follicles of the eyelashes, called blepharitis.
While red, teary or scratchy eyes might sometimes be shrugged off as simple irritation from harsh winter weather, these may actually be warning signs of ocular rosacea, a potentially serious condition that many people do not associate with a skin disorder.