Arrive Alive

Clear Vision

Introduction

The ability of the driver to have good vision is an important part of driver fitness. The SA Optometric Association provides insight pertaining to the requirement of clear vision on the web site www.saoa.co.za 

Safe driving involves:

  • Visual acuity

This is the ability to judge space and relative distance between objects or between an object and the vehicle. Depth perception depends on good binocular vision, essential for judging whether a car can be passed safely in the face of oncoming traffic and when moving from one lane to another among moving vehicles.

This is the ability to focus and see clearly with both eyes, individually as well as together. With good acuity you will see detail very easily. In the case of drivers it is particularly vital in identifying road signs, cyclists, pedestrians and animals. Peripheral vision This is the ability to see over a wider area without moving either the eyes or the head, sometimes called "looking out of the corner of your eyes". It refers to your total field of vision.

  • Depth perception

Night vision

This is the ability to see in the area of low illumination beyond your headlights, to see in the presence of the glare of oncoming headlights and to recover quickly from its effects. Night vision deteriorates with age and older drivers with reduced vision will need to exercise greater care when driving at dusk and at night and should have proper driving spectacles.

WHY GOOD VISION IS NEEDED

The eyes control most of your movements and decisions while driving. With good vision and visual comfort you can drive safely by maintaining concentration. Daylight vision problems are usually worse at night, increasing the risk in driving.

Many motor vehicle accidents are caused by drivers’ poor vision. According to most parties involved in an accident, the other driver "must have been blind".

Let’s look at some of the possible causes of these accidents: 

  • The driver’s vision is below the recommended standard. He could have a visual deficiency such as nearsightedness, farsightedness or astigmatism. Cataracts could also affect the driver’s vision. 
  • Failure to wear spectacles or contact lenses where they have been prescribed for distance use. 
  • Low visibility due to darkness or adverse weather conditions, including extreme heat. 
  • Driving too fast. The normal field of vision is 180°. At 95 km/h the field of vision is only a quarter of its normal size. This means that the faster you drive, the less you see to the side. 
  • Glare in the driver’s eyes. 
  • A dirty windscreen. 
  • Distraction of driver from either inside or outside the vehicle. 
  • Reduced mental alertness because of fatigue, alcohol, drugs, boredom or general physical condition.

 

TIPS FOR EASIER, SAFER DRIVING 

  • If you have prescription spectacles for driving, make sure you always wear them. 
  • Wear professionally prescribed sunglasses to protect your eyes from sunglare. They will also screen out harmful ultraviolet radiation. 
  • Ensure your windscreen is always clean and scratch-free, both inside and out. 
  • Make sure your headlight glass is clean, that the bulbs are in good working order and that the lighting system is properly positioned. 
  • Don’t stare at oncoming headlights - it takes longer to recover from the glare. Look a little to the left. 
  • Allow your eyes to adapt to lower light levels when moving from brightly lit areas to darker areas. 
  • The golden rule of night driving is "Speed must go down with the sun". 
  • Good driving needs good vision. It is your personal responsibility to be certain you have the visual skills necessary to drive safely. The eyes, like the rest of the body, change throughout life. Good vision 5 years ago does not imply good vision today. 

[ Information provided by the SA Optometric Association ]

Have your eyes examined by an optometrist once a year!

Also view:

 

Loading...

Search Road Safety Articles

Latest Pages

Eye Protection and Road Safety

Eye Protection and Road Safety

Introduction to the Eye Care and Road Safety Our eyes and eyesight are perhaps the most important of our senses on the road. Seeing is a highly active function. Our eyes continually move and adjust, receiving a constant flow of visual impressions. Normally, all this activity happens routinely and

Read More

Eye Diseases

Eye Diseases

Eye Diseases that affect Drivers For most people, driving represents freedom, control and independence. Driving enables us to get to the places we want to go to at our own convenience. More importantly, to many others, it represents a means of earning a living. Even though it seems so simple, driving

Read More

Eyesight and Safety on the Road

Eyesight and Safety on the Road

Why is good eyesight so important? Most of the information we use when driving comes to us through the eyes, like the road we are travelling on, road signs, pedestrians and other vehicles. Our eyes control most of our movements and decisions while driving. All drivers, especially you as a professional

Read More

Medicine / Medication and Road Safety

Medicine / Medication and Road Safety

Medication and the Effect Thereof One of the greatest sciences today is that of medicine and it doesn’t matter what season of the year, the body might need it to help cure the cause and symptoms of illness. During the winter months a lot of us head of to our pharmacist in order to buy medication

Read More

Cholesterol Medication And Road Safety

Cholesterol Medication And Road Safety

Cholesterol Medication and Road Safety Drivers are often unaware of the impact that medication might have on their ability to drive. It is important that we create more awareness on the side effects of medication and provide drivers with the necessary advice to protect them and other road users. Pharmaconnect

Read More

Road Safety and the Elderly / Older Road Users

Road Safety and the Elderly / Older Road Users

Background Road Safety Authorities and non-government organizations place much focus on road safety and the younger generation - but often neglect the older road users. The group of elderly road users is getting increasingly larger and our road safety strategies should pay more attention to the possibilities

Read More

Load More Pages

Partners

View All