You may don’t know these about sunglasses!

What do you care most when choosing sunglasses, whatever we use them boating, driving or something like that, one of the most important factor we always care is its ability of UV protection, but we may also find that some cheap sunglasses that still can guarantee the 99% to 100% UV protection, how can they do that? We may all have the idea that the more money we spend on it, the more UV absorption it provides! Typically, most sunglasses lenses will be UV absorptive to some degree, even those ordinary CR-39R plastic lenses, how much do you think they can absorb the UV light, 88%! And if you choose polycarbonate lenses, the UV light is absorbed by 100 %!