Okay. But glass sunglasses break easily, are heavy, and are somewhat outdated.

One of the most important functions of sunglasses is to block strong light and prevent harmful rays such as ultraviolet rays from entering the human eye too much and causing damage. If you wear sunglasses in summer, first of all: it can reduce the adjustment burden of the ciliary muscles of the eyes under strong light, allowing the eyes to see objects in the natural light they are accustomed to. This is the most comfortable time for the human eyes. , Second: Wearing sunglasses is not only to block harmful rays, but also to prevent sand and dust particles from entering people's eyes in windy weather. This, to a certain extent, becomes the best haven for the eyes. . According to the determination of relevant experts, since 1996, sunspot activity has become more and more frequent, causing ultraviolet rays to cause more and more harm to the human body. Especially in plateau areas such as Qinghai and Tibet in my country, due to long sunshine hours, they are most susceptible to ultraviolet rays. harm, so people living in these areas should especially wear sunglasses.

Choose sunglasses

At first, there was only one type of sunglasses with large frames and large lenses. Because they looked like the eyes of a toad, people at that time also called them toads. The mirror is round and has only one color, black. Nowadays, there are wide-edged and narrow-edged ones, square ones, round ones, long ones, and partial ones. There are also many colors, such as red, green, yellow, and amber. There are now more than 20 kinds. There is a lot of choice, but it is not Any color is good for the eyes.

The production materials of sunglass lenses currently on the market are basically the same as those of myopia lenses. They are also divided into two categories: glass sheets and resin sheets. However, the processing techniques of the two are different. Sunglasses with glass lenses are mainly made of glass materials. Some metal salts with special absorption properties are added into the glass. For example, glass lenses with nickel and cobalt are purple, glass lenses with cobalt and copper are blue, and sunglasses with resin lenses mainly use the immersion dyeing method, which is to dye the lenses. Soak in hot water dissolved in organic pigments for coloring, but no matter which coloring method the color of the sunglasses must be beneficial to our eyes.

Expert: From a physiological point of view, gray, green, and brown are good for human eyes, but too dark or too light is not good. Various sunglasses have different functions.

Blue-gray: The highest visible light absorption rate and darker visual effect.

Mercury: High-density lens coating is used for outdoor sports.

Yellow: Improves contrast and provides more accurate vision, also known as night vision goggles.

Gray film: It absorbs any spectrum evenly, so the scene will only become darker when viewed, but there will be no obvious color difference, showing a real and natural feeling.

Brown film: Improve visual contrast and clarity, filter out a large amount of blue light. The wearing effect is better when the air is seriously polluted or foggy.

Ray-Ban Green: While absorbing ultraviolet rays, it maximizes the green light reaching the eyes, suitable for people who are prone to fatigue.

However, sunglasses that are too dark are likely to cause traffic accidents due to poor traffic signal recognition capabilities, and sunglasses that are too light cannot block the sun. The country currently only regulates red, green, and yellow There are strict regulations on the traffic signal recognition ability of the three colors of sunglasses. There are no relevant regulations on other colors. You might as well give it a try when choosing sunglasses: that is, you must try it on when buying to see the change in color difference in the surrounding environment. Generally speaking, the color of small sunglasses is more suitable.

Whether sunglasses are UV-resistant or not has nothing to do with the color of the mirror, but is related to the production material of the lens. If the sunglasses are made with anti-UV materials during production, then they are sunglasses with UV protection. Such mirrors usually have a UV mark when they are sold. However, due to the limitations of the current processing technology, the UV protection function of sunglasses can reach up to 97%, not 100% at all. So when you see sunglasses with a UV100% mark, it is actually The name is not true; to judge whether sunglasses are UV-resistant, in addition to looking at whether they have a UV mark, you can also check whether the edges of the lens are smooth. Lenses with smooth edges are made of resin, and these lenses are UV-resistant. Lenses with stronger functions and wavy edges are generally made of glass material. This kind of lens not only has poor UV protection, but also easily generates degrees during installation, which is harmful to the eyes.

The top ten sunglasses brands are:

Ray-Ban (founded in the United States in 1930, a symbol of American culture, the top ten sunglasses brands, professional sunglasses Eyeglasses company, a brand of Bausch & Lomb Company of the United States),

Prosun (top ten brands of sunglasses in China, exclusive products of China's Antarctic Expedition Team, professional sunglasses manufacturer, Xiamen Quansheng Industrial Co., Ltd. Company),

dolphin PORPOISE (China's well-known trademark, Zhejiang famous trademark, Zhejiang famous brand product, one of the leading enterprises in China's eyewear industry, Zhejiang Xintai Group Co., Ltd.),

Eagle Vision (derived from NASA Jet Propulsion Laboratory, U.S. patents and international patents worldwide, top ten sunglasses brands, world brands, NASA),

Tyrannosaurus sunglasses (Ten glasses A big brand, an enterprise specializing in the production and design of glasses and sunglasses, a large spectacle frame manufacturing enterprise, Xiamen Yarui Optical Co., Ltd.),

PARIM (Fujian Province famous brand product, top ten sunglasses brands , an enterprise specializing in the production and design of glasses and sunglasses, Paramount Optical (Xiamen) Co., Ltd.)

Oakley (founded in 1975, one of the top ten sunglasses brands, an internationally renowned brand, professionally dedicated to A company that produces and designs glasses and sunglasses, Oakley Company of the United States),

Guccio Gucci (in 1923, Italy's largest fashion group, top ten sunglasses brands, world brands, top ten luxury goods in the world brand, Italian Gucci company),

Dior Dior (started in France in 1946, a brand that represents the essence of noble and elegant lifestyle, a world-famous brand, LVMH Perfumes and Cosmetics (Shanghai) Co., Ltd.),

Lantemeng Sunglasses (a famous brand in Zhejiang Province, a large-scale eyewear enterprise integrating sunglasses research, design, development, manufacturing and sales, Zhejiang Yingchang Eyewear Industrial Co., Ltd.).