Both can lead to vision problems; optic neuritis involves inflammation of the optic nerve while optic neuropathy refers to damage from any cause. Optic neuritis is one of the many causes of optic neuropathy. Optic neuropathies can be either hereditary or acquired. Acquired etiologies of optic neuropathy include ischemic, nutritional, and toxic types. 1,2 Drug-induced optic neuropathy is of the toxic type. Mechanisms of drug-induced optic neuropathy include mitochondrial dysfunction, disruption of blood flow to the optic nerve, and unknown mechanisms. 2
Fourth through eighth vehicle identification number digit reveals the vehicle features such as body style, engine type, model, series, etc. The ninth vehicle identification number digit is a VIN accuracy check digit, verifying the previous VIN numbers. This is how the check digit works/.
Instructions. Find the VIN. While seated on the driver's side of the vehicle, open the door and look at the inside door jam. You will see a sticker with information, including a combination of 17 letters and numerals. This is the vehicle identification number. Or, look on the upper side of the dashboard on the driver's side. In this case, the VIN is seen more easily from outside the vehicle. Write down this number for research.