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As summer sets in across Spain, many of us are reaching for our sunglasses before heading out for a drive. With the strong Mediterranean sun beating down, a good pair of shades can feel like an essential part of your driving kit. In fact, Spain’s traffic authority, the DGT, actively recommends keeping a pair in the car.

 

But not all sunglasses are safe, or even legal, to wear behind the wheel. Many drivers may be unaware that wearing the wrong type can lead to a fine of up to €200. And yes, that applies even to expensive, designer brands or trendy holiday purchases. Most people assume any pair offering UV protection is fine for driving, there are specific rules around lens categories and types that are easy to miss.

 

Sunglasses are classified by how much light they block, using a category system from 0 to 4. Categories 2 and 3 are the most commonly used for driving in Spain. Category 2 lenses are suitable for cloudy but bright days, while category 3 lenses offer reliable protection on sunny days and are typically recommended for daytime driving.

 

However, category 4 lenses, the darkest of all, are a serious no-go for drivers. These are designed for extreme sunlight, such as skiing or mountain sports, and block out almost all light. The DGT warns that wearing them while driving drastically reduces visibility, making them both dangerous and illegal on the road.

 

If you're not sure which category your sunglasses fall into, check the inside of the arm. You should also look for a CE marking and the reference EN 1836:1997, which shows they meet EU safety standards.

 

The DGT also highlights concerns around photochromic lenses - the ones that automatically darken in sunlight and lighten in the shade. While convenient, they do not always adjust quickly enough when entering or exiting tunnels, which can result in sudden visibility issues. For this reason, they are not recommended for driving.

 

Polarised lenses, on the other hand, are a much better option. These reduce glare from reflective surfaces, improving clarity and contrast. The DGT advises choosing polarised sunglasses with a UV filter of category 3 and in neutral lens colours like grey, green or brown.

Regardless of the tint level, wearing sunglasses at night, in dark conditions, or inside tunnels is strictly prohibited. Visibility is already reduced in these situations, and sunglasses make it even harder to spot hazards. Police consider this a serious offence and may issue an immediate €200 fine.

 

The DGT also reminds drivers that good vision is essential for road safety. Around 90 percent of the information we rely on while driving is processed through our eyes. So, if you haven’t had your eyesight checked recently, now might be the time to book an appointment with an optician.

 

In short, sunglasses can protect your eyes and make driving safer… but only if they meet the right standards. Choose wisely, check the label, and avoid unnecessary fines or accidents during your summer travels.

 

 

Images: Pixabay