How to buy sunglasses?

Sunglasses are a must-have for going out in summer. A pair of qualified sunglasses can not only add charm to yourself, but also reduce damage to your glasses. Professionals will introduce how to choose sunglasses from different aspects. 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. 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. 2 Colored lenses: also known as'dyed lenses', it is to add some chemicals in the manufacturing process of the lenses to make the lenses show colors to absorb light of specific wavelengths. This is the type of lens commonly used in sunglasses. 3 Painted lens: This kind of lens presents the same effect as the colored lens, but the way it is made is different. It is to paint the color on the surface of the lens. It is well-known as the 'graded colored lensDeep, then gradually lighter down. Generally, sunglasses with power are mostly painted with lenses. 4 Polarized lenses: In order to filter the dazzling rays of the sun shining on water, land or snow in equal directions, a special vertical coating is added to the lenses, which is called polarized lenses. It is 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. Second: According to confirmation, the best lens colors for sunglasses are brown, gray and green. Let's take a look at the protective effects of various colors! 1 Brown series: Brown series lenses can absorb the purple and cyan in the light, and absorb almost 100% of the ultraviolet and infrared. The soft tone makes the eyes less fatigued. It is a very good protective lens. 2 Gray glasses: can completely absorb infrared rays, and most of the ultraviolet rays, and will not change the original color of the scene. Gentle and natural colors are a popular choice for lenses. 3 Green glasses: Like gray glasses, it can absorb all solitary infrared rays and 99% of ultraviolet rays. The cyan and red in the light can also be blocked, but sometimes the color of the scene will be changed after passing through the green lens. But because green gives people a cool and comfortable feeling and is also good for eye protection, it is an excellent choice for sunglasses lenses. 4 Red glasses: The effect of red lenses in blocking ultraviolet and infrared rays is slightly inferior to those of the above three, and it has better blocking properties for light with shorter wavelengths. The pink lens is soft in color, and for some wearers, the psychological benefit is greater than the actual effect. 5 Yellow glasses: Yellow lenses can absorb 100% ultraviolet rays and most of the blue light. After absorbing blue light, the scene will be clearer, so we can find that when hunting or shooting, wear yellow lenses as filters It is very common! When buying sunglasses, you should pay attention: Third: According to the purpose, sunglasses can generally be divided into three categories: sun-shading glasses, light-colored sunglasses and special-purpose sunglasses. The so-called sun-shading mirror, as the name suggests, is used for shading. People usually adjust the luminous flux by adjusting the size of their pupils in the sun. When the light intensity exceeds the adjustment ability of the human eye, it will cause damage to the human eye. Therefore, in outdoor activities, especially in summer, many people use sun-shading glasses to block the sun to reduce the fatigue caused by eye adjustment or the damage caused by strong light stimulation. Light-colored sunglasses are not as good as sun-shielding mirrors, but they are rich in colors, suitable for use with all kinds of clothing, and have a strong decorative effect. How to choose sunglasses for different groups of people should choose sunglasses according to different preferences and different uses, but the fundamental thing is to start from the basic principles that can ensure the safety of the wearer and the vision is not damaged. Reducing strong light stimulation, clear vision without distortion, anti-ultraviolet, color recognition without distortion, and accurate identification of traffic signals should be the basic functions of sunglasses. If the above-mentioned functions are defective, they may not function as sunglasses, but may produce dizziness, swelling of the eyes and other consciously unsuitable symptoms. Sometimes, they may also cause slow response, illusion of color discrimination, unequal walking, and cause traffic. Accidents, etc. Therefore, when choosing sunglasses, you can't just focus on style and ignore its inherent quality.
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