When driving, the value of seeing properly can not be underestimated. As a matter of fact, driving safely requires a combination of a number of different visual capabilities - for example, distance and near vision, side or peripheral vision, seeing in limited light and color vision, plus many others.
Being able to see well into the distance is crucial because it lets you scan the road in front of you and become aware of any dangers that might come up. Most importantly, it allows you to act fast and prevent an accident from happening. Alternatively, if you don't see ahead well you may not see hazards in time to stop an accident.
You also need peripheral vision, which allows you see both sides of your car, which is important to be aware of other cars, animals and pedestrians without needing to look away from the road lying ahead. Strong peripheral vision is also important for switching lanes and turning. Maximize use of both your side and rearview mirrors. Make sure they're well-positioned, to help your side vision.
Road safety is also highly dependent on good depth perception. It allows you to evaluate distances properly in crowded traffic, change lanes and overtake other vehicles. Accurate depth perception calls for proper sight in both eyes. If one lacks proper vision in one eye, it's essential to check with an optometrist to determine whether it is safe for you to drive. It may be suggested that you stop driving until a solution is found to correct your vision.
Accommodation also keeps you in good stead on the road. If you're unfamiliar with the term accommodating, it is the capability to shift your focus from a view in the distance to something close, like from the road to the speedometer. If you've recently hit middle-age you might have trouble with near vision, and it's normal to require glasses or some other vision correction solution to help you see objects up close. Speak to your optometrist to discuss the options.
It's best not to wait until you renew or apply for your driver's license to have an eye exam. You don't want to risk your own life or the lives of other people on the road! If you think your vision isn't up to par, visit your eye doctor, and get a thorough eye exam right away.