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.
In the fall, your sleep pattern can change, you can get exhausted from the heat in the summer, and the spring brings with it red eyes and scratchy throats. But the winter? Now that's a whole other beast entirely, and when the cold weather sets in, your body starts to do some strange things.