How to choose sunglasses

1. How to choose sunglasses There are many brands of sunglasses, with prices ranging from 10 or 20 yuan to as high as thousands of yuan. In the face of a dazzling array of sunglass near me, I don't know which one to choose. Some look beautiful, but are not practical; some are very practical, either ugly or too expensive! Hey, it's too difficult to choose a pair of sunglasses that suit you! This article will help you choose a suitable pair of sunglasses. After reading this article, I'm sure you can choose a pair of sunglasses that suit you. The function of sunglasses. Protect against ultraviolet rays, block bright light, and protect eyes. Sunscreen, protect eye skin from sunburn or melanin precipitation. Anti-wrinkle, avoid photophobia and squint, leading to fine lines in the eyes. Anti-sand, especially friends in the north, sandstorm weather, sunglasses are really a refuge for our eyes! Act cool, haha, this is also a function of sunglasses! The types of sunglasses There are three types of sunglasses categorized according to their uses: sun shades, light-colored sunglasses and special-purpose sunglasses. Sunshade sunglasses are mainly used to block the sunlight, in order to reduce the fatigue caused by the adjustment of glasses or the injury caused by bright light. Light-colored sunglasses come in a variety of colors and styles and are suitable for matching with all types of clothing. Special purpose sunglasses are used for beaches, skiing, mountain climbing, golf and other fields with strong sunlight. (1) some sunglasses are marked with UV value, which refers to the blocking ability of ultraviolet rays. Generally speaking, uv380 can effectively block ultraviolet rays, and uv400 can filter out 99% ultraviolet rays. According to various tests on the Internet, many cheap miscellaneous-brand sunglasses can also completely block ultraviolet rays. (2) choose polarizing lenses as far as possible. Polarizing lenses can filter dazzling and reflected light.

2. (3) people with myopia can wear a layer of sunglasses or a pair of sunglasses with a degree of myopia. Differences in the materials of sunlenses: The optical performance of glass sheet is the best of all materials, but because of its heavy weight and fragile shortcomings, it is gradually used less and less. Resin lens is one of the most widely used lens materials, which has the advantages of light weight, high temperature resistance and strong impact resistance, while when used in sunglasses, the most important feature of resin lens is its strong coloring performance. In addition to these two widely used lens materials, there are nylon, PC, TAC and other materials. Nylon lenses have high elasticity and professional protective functions, and the sunglasses made of them are mostly used by athletes and professional protection personnel. Although the PC film has a strong anti-impact performance, no matter how easy to break, but its optical performance is very unstable. TAC material has been abandoned by many international well-known brands because of its poor wear resistance and unstable optical properties. Generally speaking, the basic function of sunglasses is to reduce the stimulation of strong light, keep vision clear and undistorted, prevent ultraviolet radiation and avoid color distortion. If these functions are defective, it not only can not play the role of sunglasses, but also may lead to symptoms such as dizziness, sore eyes, slow response, illusion of color discrimination and even traffic accidents. So when we choose sunglasses, we can't just pay attention to the style and ignore its inherent quality.