Glossary
Vision is the part of the nervous system that allows us to see. Vision gives you about 90% of all the information you take in when you drive a car, which is why it is the most important sense that we use when driving. It is because of this that there are requirements for space for vision, and why you need to have an eye examination before you can start practice driving.
You should also have regular eye exams over the years to make sure that your vision is good enough. Often, you do not notice that your vision is deteriorating until you have an eye examination and get glasses or lenses that correct any vision defects.