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Summer’s coming and with that the scorching hot African sun. Now is the time to take a closer look at your sunglass lenses and see if they are protecting your eyes properly.
Your sunglasses should block out 75-90 % of visible light. To determine if a pair is dark enough, try the glasses on in front of a mirror. If you can easily see your eyes through the lenses, they probably are not strong enough. They must also block 99 to 100% of UV rays. The ability to block UV light is not dependent on the darkness of the lens or the price tag.
Rather look at the labelling that confirms UV blocking, but since this is often absent, avoid sunglasses that don’t state the level of protection.
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