A pair of sunglasses suitable for your face, comfortable to wear and able to protect your eyes from harmful external light is the best choice for consumers. Protecting eyes and facilitating clothes matching are two major functions of sunglasses. Both can attract attention, attract attention! The first indicator: appearance 1, the matching degree between sunglasses and face is round face-suitable for glasses with slightly thicker frames and cooler and darker lenses, which has the visual effect of "tightening" the face. Too bright yellow and red lenses or sunglasses with slender and soft frame lines will set off the face more. Long face-you should choose a flat or curved mirror with a slightly thicker foot. Such sunglasses can effectively weaken the slender feeling of a long face. Face-lifting is generally skinny. Choosing feminine pink or burgundy lenses can increase the brightness of the face. Square face-it is advisable to choose sunglasses with narrow width and smooth corners of the frame. A frame that is too big and too square will only make the face look more square, and the color of the lens is stable brown. Diamond face-it is suitable to choose rimless sunglasses with metal frame or lighter and thinner lenses to reduce the weight above the face and not make the already wide place more swollen. Oval-suitable for wearing thin-rimmed or rimless glasses. Choosing elegant lens colors such as blue, purple and light brown will have unexpected effects. Inverted triangle-glasses with thicker frames, darker colors and slightly wider lateral width should be selected to adjust the ratio of up and down and give people a sense of visual harmony. 2. Mastering the style of sunglasses is popular this season. The overall style of sunglasses continues last year's fashion and is shallow and transparent. It is so light that all colors have the texture of gauze as if they had been washed: it is so transparent that you can see every look in your eyes, even the frames. In order to match colorful summer clothes, the glasses launched by major brands lead the trend of this season in color and style. Violet, pink, light yellow, sky blue and light green all present an indispensable aesthetic feeling against the background of different clothes, among which two-color gradient lenses are loved by more young people. In style, it presents a bipolar fashion trend, big or small. The conjoined lens is the most fashionable large-scale lens, like an athlete's goggles, full of sci-fi effect and dynamic vitality; Small lenses go to extremes, so small that they have no space of their own, and some even just cover their eyes. In terms of borders, both plate frames and metal frames are exquisitely processed, bright and delicate. Quan Huafu, half frame and no frame all have their own fans; The shapes of lenses are also varied, among which ellipse, rectangle and hexagon are the most fashionable. The second indicator: material 1, the material of the frame sunglasses has made a major breakthrough in the material. Ceramic materials such as titanium, jewelry, plastic, enamel, rubber and polyester acetic acid are more widely used, and designers are increasingly fond of making them with natural materials, such as hand-made wooden and horn frames. Thin and exquisite has become the only rule of fashion frames. Because of the fine materials, they are very soft to wear and have a good decorative effect. Well-known brands are also displayed on the frame, and the artistic LOGO has become a part of the product. Plastic layering (divided into three layers, the middle layer is often made of heterogeneous materials and cleverly embedded in two layers) is also a highlight of today's frames, as well as fluorescent frames and transparent frames that also show youthful vitality, and so on. 2. Lens materials At present, the most common lens materials on the market are glass and resin. Glass lenses tend to be eliminated because of their fragility and heaviness (except Ray-Ban's tempered glass lenses). Compared with glass, resin lens has the following advantages: not easy to break, light weight and high light transmittance. The inspection indexes of high-quality lenses are: shockproof, scratch-proof, high-tech coloring technology, lightweight, ultraviolet-proof, and clear and eye-catching appearance. The third indicator: the color of sunglasses is very particular. Lenses of different colors often have different uses. You can choose according to your own needs. However, gray and tan sunglasses have the best anti-ultraviolet ability. This year's sunglasses are popular with multi-color mixing and smudging effects. Red, metallic, black, dark green and British green all have colors, but not everyone is suitable for lenses of these colors. Therefore, it is best to consult an ophthalmologist in advance before choosing sunglasses. Scientific collocation can also help the eyes to have a good optical correction effect. The fourth indicator: anti-ultraviolet indicator: the wavelength range of visible light is between 400nm and 750nm, and those shorter than 400 nm are ultraviolet rays and those longer than 750 nm are infrared rays. The main function of sunglasses is to block ultraviolet rays (99% to 100%) and harmful rays, reduce the transmittance of visible light, and effectively protect eyes. Regular optical shops generally have small instruments to detect the ability of sunglasses to engage in ultraviolet rays. Through the test, you can know whether your choice is correct or not. Of course, it does not mean that the higher the price, the stronger the shielding function against ultraviolet rays. Angles sunglasses are often based on their style design and brand value. Special reminder: 1. According to scientific research conducted by BOOTS, a British retail group, lenses with pink, blue, green or other bright colors may distort the wearer's vision and make it impossible to see certain colors clearly. Special occupations, such as car drivers, should be carefully chosen. 2. When buying sunglasses, you should choose glasses with CE logo to ensure that you can block some ultraviolet rays. 3. Check whether the diopter is accurate. Ordinary sunglasses have no power, that is, the diopter should be 0, so when buying sunglasses, try to see if there is dizziness and headache. At present, there are some myopic sunglasses with degrees on the market, but because the pupil distance and other indicators vary from person to person, consumers had better not choose these sunglasses with degrees without professional guidance. When you buy sunglasses, you should lay them flat on the counter. If the glasses can't be placed smoothly, there is something wrong with the frame. When buying sunglasses, put your foot against the fluorescent lamp and let the reflective strip of the mirror roll gently. If the fluorescent lamp shadow reflected by the mirror appears wavy distortion, it proves that the lens is uneven. This kind of lens will damage your eyesight. 6. Eyes are very sensitive tubes, so when choosing sunglasses, the quality of lenses should be given priority; Transparency should be high; The lens should be flat; It should have the function of filtering ultraviolet rays. 7. When attending formal occasions, please don't hang sunglasses at random, which will be indecent.