Whether it's a discount store or a designer boutique, sunglasses are a must, regardless of the season. However, sunglasses are not only a fashion accessory, but also a versatile tool that can protect your eyes from harmful UV rays and create shade on sunny days. This improves visibility and reduces the chance of dazzling. Temporarily out of sunlight while driving (especially important). Like sunglasses, not all sunglasses are of the same quality. Be careful when buying pairs. The most important consideration when buying sunglasses is to find a pair that provides complete protection against the sun's UV rays (both UVA and UVB), even on cloudy days. Experts disagree with the possible adverse effects of UVA rays on the eye, as UVB rays are known to cause many eye conditions, including permanent damage to the retina. Make sure your sunglasses are completely protected against UV rays. Sunglasses come in a variety of styles and types. If fashion is the most important consideration, choose a stylish frame and then add a custom UV protection lens. If sunscreen is of utmost concern, choose sunglasses in a case that blocks the light that normally travels over the frame of regular sunglasses. If you find a style you like, think about glasses. You've probably seen sunglasses with lenses of different colors. Cheap plastic sunglasses, color is just a fashionable choice, but with the right lenses, you can learn more about the purpose of your sunglasses. If you know different types of lenses, you can make the best decision when choosing sunglasses. Photochromic lenses change color depending on the amount of UV light they expose, but in most cases they produce dark shadows on the outside and bright or bright shadows on the inside. Photochrom lenses combine the illusion of regular sunglasses and glasses in one package. Amber lenses tend to block blue light. While it is debated whether blue light is harmful to your eyes, outdoor enthusiasts agree that blue blocking lenses are suitable for skiing, hunting and fishing. Mirrored sunglasses limit the light that reaches your eyes and make them easier to see in very bright conditions. Gradient lenses, as the name implies, are lenses that are colored with varying opacity, from top to bottom or from bottom to top. The top-down gradient lenses in sunglasses are ideal for driving and seeing the controls clearly. Sunglasses with polarized and anti-reflective covers reduce the amount of reflected light that reaches your eyes. This is very effective in very bright situations, such as in the snow on a sunny winter day. Almost all styles of sunglasses, lenses and frames can be made with a special prescription, so even people with poor eyesight can benefit from wearing sunglasses.