have become a necessity for many people to travel, but many people do not pay attention to the choice of sunglasses, and do not know how to choose sunglasses. So how to choose the right sunglasses? Recommended reading: What is the effect of wearing polarized sunglasses? YC9703 Women’s Sunglasses C3 Black/Colorful Blue Choose lenses to choose anti-ultraviolet lenses. Wear sunglasses to prevent light and ultraviolet rays from harming the eyes. First, shading can prevent headaches caused by glare light; secondly, if the ultraviolet rays in the sun enter the retina, it will It can cause macular degeneration of the retina and even cataract and other eye diseases. Inferior sunglasses only use colored lenses to block the light. Human pupils will naturally dilate in low light. However, inferior sunglasses lenses do not have the function of preventing ultraviolet rays. Instead, the enlarged pupils will absorb more ultraviolet rays, which can easily cause cataracts. Solar keratitis, corneal endothelial damage and macular degeneration of the eye and other diseases. Lens function selection 1: Polarized lenses: In order to filter the dazzling rays of the sunglasses in equal directions on the water, land or snow, a special vertical coating is added to the lens, which is called a polarized lens. It is most suitable for marine activities, skiing or fishing, but it is not suitable for daily life, especially when driving, because it will make you more unclear on the reverse side. 2: Anti-reflective protective lens: This kind of lens is coated with a thin layer of magnesium fluoride on the surface to prevent the reflection of strong light, allowing you to see things more clearly and without interference from strong light. To check whether your glasses really use anti-reflective protective lenses, you can point the glasses at the light source. If you see purple or green reflections, it means that the lenses are indeed coated with anti-reflective protective film. 3: Colored lenses: also known as 'dyed lensesThis is the most commonly used lens type for sunglasses. 4: Painted lens: This kind of lens presents the same effect as the colored lens, but the way it is made is different. It paints the color on the surface of the lens. The most well-known is the 'gradient colored lensThe top is the deepest, then it gets lighter down. Generally, sunglasses with power are mostly painted with lenses. 5: Color-changing lens: It is also called 'photosensitive lens'. Because the chemical substance of silver halide is added to the lens, the originally transparent and colorless lens will turn into a colored lens when exposed to strong light for protection. So it is suitable for both indoor and outdoor use. Then choose the frame style, there are many styles of sunglasses, you can choose the one that suits you. Related Reading: Sunglasses and Sunglasses
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