How do you test the UV protection of sunglasses?

How are sunglasses tested for UV protection?

Sunglasses protect the eyes from harmful UV rays. The testing process takes place in specialized laboratories where advanced equipment simulates the sun's rays. A UV meter emits controlled amounts of UV light towards the lenses of the glasses, and measurements are made of how much light is absorbed, reflected or transmitted. The results are converted into a protection percentage that indicates how effective the UV protection is.

Standardized tests and certification

Independent laboratories compare sunglasses with international standards set by health organizations. The "UV400" label means that the glasses protect against both UVA and UVB rays. Such certification ensures that the sunglasses meet the requirements for protecting the eyes from the sun's harmful rays.

Important considerations when buying sunglasses

When choosing sunglasses, it is essential to check whether they meet the applicable international standards and whether the manufacturer provides detailed information about the test results. This provides reassurance that your sunglasses are both stylish and provide the necessary protection.

Typical questions answered

• How does the UV test work?
– The test measures how much UV light the sunglasses block by using controlled UV light rays and advanced measuring equipment.

• What does the UV400 label mean?
– UV400 indicates that the sunglasses protect against both UVA and UVB rays according to international standards.

• Are the test results verified by independent laboratories?
– Yes, many sunglasses are tested and certified by independent laboratories that ensure they meet applicable health and safety standards.

• Why is documented UV protection important?
– Documentation ensures that your eyes are adequately protected from the sun's harmful rays and provides peace of mind when choosing your sunglasses.