u003cbru003eSpring is here and the sun is shining brightly. All kinds of fashionable sunglasses
have become people's darlings. However, if you choose and wear sunglasses improperly, your eyesight can also be damaged. So what do you need to know about the choice and use of sunglasses? YC9705 Universal Sunglasses C7 White/Colorful Purple Some people wear sunglasses regardless of time and occasion, outdoor or indoor, even at dusk or watching movies. This will increase the burden on the eyes, cause tension in the eye muscles and blurred vision. In severe cases, symptoms such as dizziness and inability to see for a long time may occur, or symptoms such as numbness of the skin between the eye sockets and cheeks, and dullness, and the nose when breathing. Discomfort, or feeling that there are small bugs crawling on the face, sore eyes, etc. This is caused by often wearing glasses with wide sides, thick frames, and heavy weights. In addition, patients with glaucoma, senile cataracts, and obvious lens expansion should not wear sunglasses. Children under the age of 6 are not suitable for wearing sunglasses for a long time. Ray-Ban RB3449 Men’s Sunglasses Silver/Lens Colorful Blue 004/55 Lenses with different colors are also suitable for different light environments. For example, greenish sunglasses make the color transmittance curve of the lens closer to the natural curve of the eye. Therefore, the scene you see will remain clear for a long time and can reduce eye fatigue; brown lenses enhance visual acuity by increasing the contrast, and the vision effect is very good in blurred vision, foggy or general gloomy weather; brown lenses It can block the reflected light, and you can see the subtle parts of the object in the dazzling sunlight; the blue, light yellow and pink lenses have weak anti-reflection ability and are not suitable for wearing under strong light. Regarding the choice of sunglasses lenses, the editor will teach you three ways to choose sunglasses lenses: 1. Lens color selection experts say that many sunglasses will indicate 1, 2, and 3 categories on the tag, which refers to the shade of the sunglasses lens. The deeper the color, the higher the number, and the more obvious the effect of blocking the sun. The first way to choose sunglasses is to choose the color that suits you. Second, the choice of lens quality The second way to choose sunglasses is to carefully check the quality of the sunglasses after identifying the color of the lens. It is necessary to check whether the lens surface is smooth, whether there is warpage, wear marks, air bubbles, lens warpage, etc. At the same time, the lens should not be too thin, otherwise high temperature deformation will also cause dizziness. Third, the choice of lens material The third way to choose sunglasses lens is to examine the material. At present, the materials used to make colored glasses mainly include resin, PC, polarized light, and nylon. The advantages of the PC material lens are large toughness, thermal expansion and contraction coefficient is small; polarized lenses filter out the excess light, so that the object looks very clear, because it can withstand the reflection of the water surface, especially suitable for wearing when fishing; glass lens clarity It is higher than resin, but heavier and fragile, so it is less used; nylon material has very high elasticity, excellent optical quality, and strong impact resistance. It is usually used as a protective article. Which lens is suitable for you depends on your needs. Related Reading: Sunglasses and Sunglasses
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