Proper vision is necessary for road safety. Actually, safety on the road depends on a number of visual capabilities like distance and near vision, peripheral vision, night vision and color vision, plus many others.
Strong distance vision is highly necessary because of how it helps you to scan the stretch of road in front and spot any risks that might be present. Most importantly, it allows you to react early and avoid any accidents that might have otherwise taken place. And on the flip-side, if you don't see ahead well then there's a chance you might not be aware of the hazards soon enough.
Distance vision is also directly related to the condition of your windshield and glasses (including sunglasses), so make sure both are clean and free of both scratches and dust which can negatively affect your vision, mostly at night and on bright days.
Just as important is peripheral or side vision, which allows you see both sides of your vehicle, which is needed to see other cars, animals and pedestrians without having to even glance away from the road lying ahead. Being able to see peripherally is also crucial when changing lanes and making turns. Maximize use of your side and rearview mirrors. Check they're angled properly, to help your side vision.
Road safety is also highly dependent on good depth perception. It lets you measure distances properly in crowded traffic, switch lanes and overtake other vehicles. Strong depth perception calls for adequate sight in both of your eyes. If one lacks proper vision in one eye, it's essential to consult with an eye doctor to see whether it is safe for you to get behind the wheel. You may need to refrain from driving until your vision is corrected to achieve proper depth perception.
Near vision focusing or being able to accommodate instantly also keeps you in good stead on the road. Accommodating is the ability to shift your focus from something ahead to something close, like from the road to the speedometer. If you've recently hit middle-age it's common for you to have a slight challenge with near vision, and you might need glasses or some other vision correction solution to help you see your dashboard. Speak to your optometrist to discuss the options.
Strong color vision also comes into play while driving. Drivers must be able to immediately identify traffic lights, road signs and warning signals. If you've got color blindness, response time could be a little slower than that of others. If this is the case, avoid using medium or dark colored sunglasses, as these can seriously inhibit the ability to discern colors.
At the first sign of vision problems, think about how it affects your ability to drive. You can't afford to risk your life or the lives of the others on the road! If you suspect your eyesight isn't up to par, visit your optometrist, and have a thorough eye exam sooner rather than later.