How to choose qualified sunglasses

u003cbru003eFaced with a wide range of sunglasses, what should we do to buy a satisfactory pair? Is it just looking at the function? Now I will tell you that when shopping in the store , How to identify whether the sunglasses are qualified. YC9707 Women's Sunglasses C8 Tortoiseshell/Colorful Yellow How to choose qualified sunglasses? First of all, we must figure out the purpose of sunglasses. Sunglasses can generally be divided into three categories: sun-shading mirrors, light-colored sunglasses and special-purpose sunglasses. Sun visors use sun visors to block sunlight to reduce fatigue caused by eye adjustment or damage caused by strong light stimulation. Light-colored sunglasses are not as good as sun-shielding mirrors, and they are mainly used for decoration. Special-purpose sunglasses have a strong function of blocking sunlight, and are often used in the field with strong sunlight such as beaches, skiing, and mountain climbing. Secondly, observe whether the sunglasses lenses are uneven or have bubbles. Once the sunglasses lenses are uneven or bubbles appear, discomfort such as dizziness will occur when they are worn. Take the sunglasses about 45 cm away from the eyes, observe the vertical and horizontal lines around them through the glasses, such as window frames or door frames, and move the glasses up and down. If you find that there is a straight line distortion or swing, it means that the lens has diopter Deformed, it is a substandard sunglasses lens. YC9708 Universal Sunglasses C7 Black Frame Silver Legs/Lens Gray Third, it is necessary to try on and confirm that the frame meets your own requirements. The width of the sunglasses should basically match the width of the face, and they should be equal on both sides of the nose. If you have problems such as holding your temples or oppressing your ears at the top of your temples, you must choose another option. In addition, pay attention to whether the sunglasses have UV (ultraviolet) protection function. In addition to reducing the irritation of strong light and making the eyes comfortable, wearing sunglasses is another important purpose to prevent ultraviolet rays from damaging the eyes. The color of the lenses and whether they are UV-resistant are two different things. Therefore, when consumers choose anti-UV glasses, they must choose lenses that are marked with anti-UV function. In addition, different colors of sunglasses have different functions: 1. Gray lenses can absorb any color spectrum evenly. Although the scene will become darker, there will be no obvious chromatic aberration, which can show a real and natural feeling. Suitable for outdoor activities who like sightseeing and photography. 2. Blue-gray lenses, slightly darker in color, higher visible light absorption rate. If the sun is particularly bright, you can consider wearing blue-gray. 3. Mercury lens, the surface adopts high-density mirror coating, which can absorb and reflect more visible light, suitable for long-term outdoor sports. To know more about the relative functions of color sunglasses, please see the full version of the article Sunglasses with different colors and functions. Related Reading: Sunglasses and Sunglasses
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