Why wear sunglasses? Which sunglasses lens is better


Walking on the street now, I can see all kinds of people wearing various kinds of sunglasses. The editor is thinking, why do everyone wear sunglasses? Is the sun really piercing the eyes? So many colorful sunglasses lenses Which one is better? Most people know that the ultraviolet rays in the sun can harm the skin. Of course, it can also harm our eyes. Sunlight will have a destructive effect on every part of the eyes, and it is cumulative and accumulated over time. It will have a destructive effect on the cornea, retina, and lens of the eye, and will cause eye diseases such as cataracts and actinic cornea. However, so many people choose to wear sunglasses in addition to sun-shading and protecting the eyes, and another important function is fashion! Recommended reading: How to judge whether sunglasses are qualified? So what important conditions should our ideal sunglasses have? 1. It must be able to filter more than 98% of the ultraviolet rays in the sun. 2. The function of blocking glare. 3. It cannot cause 'parallax' and 'chromatic aberration'. 'Parallax' refers to the misjudgment of objects being distorted and going up and down stairs after wearing glasses. When the 'chromatic aberration' is severe, the red and green lights will be unclear, causing danger. 4. The style of sunglasses should be fashionable, fashionable, and most fashionable! Of course, glasses frames are also the focus of sunglasses. In addition to its aesthetic requirements, it must be able to stabilize the lens and prevent it from loosening or falling. 5. The surface treatment of sunglasses lens, refractive, curvature and safety enhancement are also important elements of sunglasses eye protection and eye protection. Recommended reading: How to choose the material and color of sunglasses. If you want to buy an ideal pair of sunglasses, in addition to buying regular sunglasses and fashionable sunglasses, you have to choose the type of sunglasses according to your own situation. What types of sunglasses are there? There are several categories of sunglasses lenses: 1. 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 not interfered by strong light . 2. Colored lenses: also called 'dyed lenses3. Polarized lenses: In order to filter the dazzling rays of the sun shining on the water, land or snow in equal directions, a special vertical coating is added to the lenses, which is called polarized lenses. It is most suitable for outdoor sports (such as marine activities, skiing or fishing). 4. Color-changing lens: It is also called 'photosensitive lens'. Because the silver halide chemical 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 indoor and outdoor use. Related Reading: Sunglasses Color Sunglasses Polarized
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