Sunglasses are legal to wear while driving in the UK if they are not Category 4, which are too dark for safe driving – opt for Category 0-3 sunglasses or specialised lenses to ensure clear vision and compliance.
Although the British summer rarely reaches scorching temperatures, it is still bright and sunny over the golden months. While sunlight can help us top up our tan, it is also a danger to motorists.
A study published in MEDICINE found that life-threatening crashes rose by 16% when sunlight is bright. During the early morning and late afternoon, the sun’s blinding glare can cause real havoc on the road.
In moments like these, a pair of sunglasses can be a lifesaver. By shielding your eyes from blinding light, they allow you to drive safely and comfortably.
But how legal is it to wear sunglasses while driving in the UK? Read on to uncover everything you need to know about protecting your vision behind the wheel.
Is it Legal to Wear Sunglasses While Driving in the UK?
Yes – as long as they aren’t “Category 4”.
You may be surprised to hear that in the UK there are actually some legal restrictions on the tint levels of sunglasses you can wear behind the wheel. While the majority of sunglasses fall within Category 0 to Category 3, Category 4 sunglasses are illegal to wear while driving due to their low level of light transmission.
Why are Category 4 Sunglasses Illegal?
Category 4 sunglasses transmit only 3% to 8% of light. These sunglasses are designed for exceptionally bright conditions like high-altitude mountaineering. As a result, they are not suitable for driving at any time in the UK, where clear vision is paramount.
What Sunglasses Categories Are Suitable for Driving?
By law, sunglasses intended for driving must not exceed Category 3, ensuring adequate visibility both during the day and in varied light conditions.
Here’s a breakdown of the different categories based on light transmission, legality, and their suitability for driving:
| Category | Light Transmission | Legality | Suitable For | Polarisation |
|---|---|---|---|---|
| Category 0 | 80%-100% (clear) | Yes | Indoors / Overcast day | No |
| Category 1 | 43%-80% (light tint) | Yes | Low sunlight conditions | Optional |
| Category 2 | 18%-43% (medium tint) | Yes | Medium sunlight conditions | Optional |
| Category 3 | 8%-18% (dark) | Yes | Bright sunlight conditions | Yes |
| Category 4 | 3%-8% (very dark) | No | Exceptionally bright sunlight | Yes |
Choosing the right sunglasses for driving depends on personal preference and external weather factors – with the one exception of Category 4 sunglasses, which are illegal on UK roads.
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How Do I Know If My Sunglasses Are Legal For Driving?
If you are wondering whether your sunglasses are fit for driving, make sure that they meet these criteria.
- Clear Vision: Your sunglasses should not be so dark that they impair your vision. They must allow you to see clearly at all times, especially in varying light conditions encountered while driving.
- Sufficient Light Transmission: Sunglasses suitable for driving should allow enough light to pass through to maintain visibility. A quick test is to stand outside and see if you can make out signs clearly. If you are struggling with your sunglasses’ darkness, they may fall into Category 4.
Even if your sunglasses fall into a legal category, they still may not be ideal for driving. Sunglasses intended for general use may ineffectively transmit light during bright conditions, blinding you on the road.
Additionally, fashion frames or overly large sunglasses may obscure your peripheral vision. This can increase your blind spot, limiting your awareness of other vehicles and hazards on the road.
Are There Specialised Sunglasses for Driving?
Yes! Specialised sunglasses not only enhance driving comfort and safety, but they can be kept in your car so you never forget them.
Polarised Lenses
Polarised sunglasses are equipped with a special filter that reduces glare reflected from surfaces such as roads, water, and snow. This glare reduction can significantly improve visibility and comfort, especially during bright sunlight or when driving on wet surfaces.
However, it’s important to note that polarised lenses may affect the visibility of certain LCD displays. If you drive a modern motor, the likelihood is that your widescreen dashboards or heads-up display is affected.
It’s advisable to test your polarised sunglasses in different lighting conditions to ensure they don’t interfere with your ability to see essential information while driving.
Photochromic (Variable Tint) Lenses
Photochromic lenses, or transition lenses, automatically adjust their tint level based on the amount of sunlight present. They darken in response to UV light and lighten when UV exposure diminishes, providing optimal visibility in varying light conditions throughout the day.
These lenses are convenient for driving as they adapt to changes in natural light, ensuring consistent visibility without the need to switch between different pairs of sunglasses.
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Bright Motor Finance Top Tips
Ensuring your vision is in top shape while driving not only enhances safety but also compliance with legal requirements. Here are some essential tips from Bright Motor Finance:
- Regular Eye Exams: Schedule an eye examination every two years to check if you need prescription lenses in your sunglasses. This provides peace of mind that you can meet the UK legal limit of 0.5 on the Snellen Scale.
- Discuss Sun and Glare Protection: Consult with your optician about sun and glare protection options. They can recommend sunglasses that provide adequate UV protection and reduce glare, improving visibility and comfort during your drives.
- Keep a Spare Pair Handy: Always keep a spare pair of suitable sunglasses in your car. This ensures you’re prepared for unexpected bright conditions that could otherwise strain your eyes and affect your ability to drive safely.
- Responsibility for Good Vision: Remember, maintaining good vision is your responsibility as a driver. In the unfortunate event of an accident, inadequate vision correction or inappropriate sunglasses could impact your car insurance coverage.
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Final Words
To sum up, wearing category 0-3 sunglasses while driving in the UK is not only legal but essential for your safety and comfort on the road. Remember these key points:
- Choose sunglasses with a suitable tint category (0, 1, 2, or 3) to ensure clear vision and compliance with UK driving laws.
- Avoid Category 4 sunglasses, which are too dark for driving and illegal in the UK.
- Consider specialised options like polarised or photochromic lenses for enhanced glare reduction and adaptability to different light conditions.
Take action today to ensure your vision is well-equipped for the road ahead. Your safety depends on it. Drive safely and enjoy the journey with clear, comfortable vision.
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