You should always wear your glasses or contact lenses when driving if you need them.
- Keep a pair of prescription sunglasses in the car to combat bright sunlight, especially in the winter when the sun is low.
- Plastic or polycarbonate lenses are less likely than glass to shatter in an accident.
- The new technology used in varifocals gives a wider field of vision for driving.
- Polarising lenses reduce glare, making them ideal for driving during bright daylight hours.
- Adding an anti-reflective coating to your normal distance driving glasses reduces glare when night driving.
The law in the UK states that you are legally required to be able to read a number plate from a distance of 20.5 metres in normal conditions. If you can’t meet this standard, your insurance will be invalid. However, there are two obvious problems with this criteria: first it requires drivers to self-test (which they rarely do) and secondly, it doesn’t test for visual fields (your peripheral vision), which is essential for safe driving. If you wear spectacles for driving, you should of course be wearing them for this test as well.
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