Sunglasses Check: What Really Matters for UV Protection

Paris – 30.06.2026: With the first hot days the sale of sunglasses also rises. The central question is: do more expensive models automatically offer better protection? Experts say no. Decisive are not price, tint color or brand logo, but clearly indicated technical criteria such as the CE marking, the UV400 indication and the filter category of the lenses according to the applicable standard.

The CE mark signals that the minimum requirements of the relevant European standard for sunglasses are met. Equally important is the indication “UV400” or “100% UV protection”. This means that ultraviolet rays up to 400 nanometers are blocked – i.e. both UV-A and UV-B. The filter categories 0 to 4, on the other hand, refer to the tint for visible light: category 0 is barely tinted, category 3 is suitable for intense sunlight at the beach or in the city, category 4 is very dark and not suitable for road traffic. Light attenuation, however, says nothing about UV filtering performance; this must be stated separately.

Inexpensive sunglasses can provide full UV protection if they are correctly labeled. Conversely, an expensive designer frame without verifiable information does not reliably protect. Consumers should pay attention to the following points: complete manufacturer identification with CE, a clear UV indication (UV400/100% UV), the stated filter category, an even tint without streaks and a distortion-free view when looking through the lenses. Trusted retailers and specialist opticians will provide product data sheets or test certificates on request.

Fit also affects protection. Large, close-fitting models that seal well at the sides reduce stray light and side exposure. Comfort features such as polarizing lenses reduce glare on water or asphalt, but do not replace UV protection. Mirrored coatings and fashionable colors are optical effects; they should only be understood as a complement to the tested filter. For children: glasses should be light, shatterproof and close-fitting – children’s eyes are more sensitive to UV radiation.

Stricter requirements apply for special environments. In high mountains, on glaciers or in snow, where reflection is strong, a higher filter category with proven UV protection is advisable; category 4 is taboo for road use. For direct solar observation, only special certified protective filters are suitable. In everyday life, a correctly labeled pair of sunglasses with UV400, combined with a hat or cap and additional sunscreen, is sufficient. When buying online, look for complete product information, a right of withdrawal and reliable seller profiles. In the end, what matters is not the price but the tested protective performance, which must be clearly documented.