How to Choose Outdoor Travel Sunglasses?
When choosing sunglasses, there are actually some considerations. The prices of sunglasses range from tens to hundreds or even thousands of yuan. Regardless of brand factors, how much difference does the quality of sunglasses differ among different grades?
Firstly, we need to start with the purpose of sunglasses. Someone can't help but ask when they arrive here. Isn't sunglasses just sun proof? Indeed, this is only one of the important uses of sunglasses. In fact, a detailed analysis of sunglasses can roughly summarize three purposes. One type of use is for summer use. Mainly for releasing sunlight, ultraviolet rays, and some glare to the eye. The second type of use is for winter use. Especially in snow, it is mainly to prevent snow blindness. The third type of use is for driving or cycling. Next, let's categorize and discuss the differences in the emphasis of the three types of uses in their selection.
The first type of use is mainly for summer use. In outdoor environments with strong sunlight, sunglasses should focus on being lightweight, breathable, and of moderate size. At this point, there are no special requirements for the material of the frame, plastic and metal materials can be used. For lenses, it is best to choose polarizing lenses, also known as polarizing lenses, which are very effective in dealing with glare.
The second type of use is in winter. At this time, the lens should mainly respond to the ultraviolet reflection from the snow to prevent Snow blindness. There is a difference between the reflected ultraviolet rays of snow and the direct ultraviolet rays of sunlight. Snow belongs to diffuse reflection, so light has no directionality. Therefore, when choosing glasses at this time, it is best to choose large lenses, preferably with side shields, to completely wrap the eyes as much as possible. Moreover, it is not suitable to choose glasses with metal frames in winter because when the temperature is particularly low, the metal may freeze and damage the skin, peeling off a layer of skin.
The third type of use is for driving or cycling, and special attention should be paid to three points. The first is that the glasses should not be too large and should be well ventilated. Furthermore, the lenses must be polarized to prevent glare from the headlights of the opposite car or strong reflections from metal, glass, and other materials on the building. The third is that the color of the lens must be as light as possible, and the transparency effect must be better. Do not obstruct sight.
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