Sunglasses play a large roll in the character that you play to others, and they can literally change the shape of your face. Sunglasses are a real character builder. They can also be worn as a fashion statement or accessory. Choose your fashion eyewear to match the seasons, your outfits, or even your mood that day. But it is important to remember that the most important job for sunglasses is to prevent damage to the eyes from the sun’s harmful rays. All sunglasses offered at REI block 100% of ultraviolet light. UV protection information should be printed on the hangtag or price sticker of any sunglasses you buy, no matter where you buy them. If it isn’t, find a different pair. Here the basic rules to pick sunglasses :
1. Look for UV and light protection
The ability to block UV light is not dependent on the darkness of the lens or the price tag. While both plastic and glass lenses absorb some UV light, UV absorption is improved by adding certain chemicals to the lens material during manufacturing or by applying special lens coatings. Always choose sunglasses that are labeled as blocking 99-100% of UV rays. Sunglasses should screen 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 see your eyes easily through the lenses, they probably are too light. But remember, very dark lenses may look cool, they do not necessarily block more UV rays.
A pair that doesn’t fit well can let UV rays seep onto your skin and into your eyes. Consider buying oversized glasses or wraparound-style glasses, which help cut down on UV entering the eye from the side. Some studies have shown that enough UV rays enter around standard sunglass frames to reduce the protective benefits of the lenses. 3. Lens Features
Polarized Lenses : Polarized lenses, using horizontally aligned polarizing micro crystals, block all vertical light and protect your eyes from this glare. Polarized lenses are particularly suitable for water sports, cycling and driving where there tends to be a high degree of reflective glare, but they do not offer additional UV protection.
Photochromic lenses : Reduce glare and adjust to changing light conditions. But once again, unless they are specifically labeled as offering UV protection, they do not offer this feature.
Interchangeable lenses: Some sunglass styles come with interchangeable (removable) lenses of different colors. These multi-lens systems allow you to tailor your eye protection to your activities and conditions. Consider this option if you need reliable performance in a wide variety of situations.
Sunglasses are a vital addition to your wardrobe for not only fashion purposes but also real protection. Be aware that even though contact lenses can provide some UV protection, sunglasses should be worn outside since contacts do not cover the entire eye.