Good eyesight is necessary for safe driving. If you think about it, safe driving relies on a combination of a number of different visual capabilities - for example, being able to see both far ahead as well as your immediate surroundings, peripheral vision, night vision and color vision, just to name a few.
Strong distance vision is very important because of how it allows you to observe the road in front and spot any risks that might appear. Being able to see ahead allows you to act fast and prevent an accident from happening. And on the flip-side, if your distance vision is poor you may not see hazards in time to stop an accident.
Equally as important is peripheral vision, which allows you see the sides of your vehicle, which is necessary to spot pedestrians, animals and cross traffic without needing to even glance away from the road ahead. Strong peripheral vision is also important for switching lanes and making turns. Use your side and rearview mirrors. Make sure they're adjusted correctly, to assist your side vision.
Additionally, good depth perception is important for road safety. This helps you judge distances properly in crowded traffic, change lanes and pass other cars. Good depth perception requires adequate sight in both of your eyes. In cases of people that have lost vision in one eye, it's advised to check with an eye doctor to determine whether it is okay for you to get behind the wheel. It may be suggested that you stop driving until your vision is corrected to achieve proper depth perception.
Near vision focusing or the ability to accommodate instantly also keeps you in good stead while on the road. If you're unfamiliar with the term accommodating, it is the capability to shift your focus from a view ahead to something in front of you, like from the road to the dashboard. If you've recently hit middle-age you might have a slight challenge with near vision, and it might be helpful for you to get glasses or some other vision correction solution to make it easier to see your dashboard. Call your eye doctor to discuss the best option.
It's best not to wait until you renew or get your driver's license to have an eye exam. You don't want to risk your life or those of other people on the road! If you think your eyesight isn't perfect, see your eye doctor, and get a proper eye exam right away.