Summer is the most in need of sunglasses of the day, the sun is very glaring. A good cheap ray ban sunglasses can not only make people have temperament, but also can protect the eyes from the sun damage, so choose a suitable sunglasses is very important.
Sunglasses by color depth is divided into four kinds, followed by 15%, 34%, 50%, 70%. 15% of the depth of the most shallow, suitable for indoor and outdoor wear, especially those who have degrees in the eyes. 34% of the depth, suitable for general use under the sun. 50% of the ray ban sunglasses, you can wear in the hot sun and the sea. 70% of the sunglasses is a special purpose, and generally used for welding and other engineering professionals.
However, the depth of the color of the lens only affects the absorption of visible light, has nothing to do with the ability of anti-ultraviolet, if it is decorated with ordinary color film on the line, protect the eyes, then recommend the purchase of polarized lenses. Polarized sunglasses is the primary function of UV and filter polarized light, a good polarized sunglasses lenses can block more than 90% of UV penetration. You can select the polarized cheap ray bans sunglasses with the “UV400” best blocking UV logo.
1.Light red or vermilion: in the case of strong glare, you can deepen the contrast and sharpness, is ideal for water sports and snow activities.
2.Brown or brown: you can enhance the color contrast, so the preferred lens when driving.
3.Amber, yellow or orange: very suitable for use in cloudy days, can have a very clear vision, but not suitable for use in strong sunlight.
4.Gray or dark green: to retain the most natural of the original color, is a good choice.