In the previous article, we discussed “Why you should wear sunglasses in the winter?”. In this article, let’s talk about “What are the pros and cons of polarized sunglasses?”.
There are many sunglasses on the market now. Some sunglasses are marked as polarized. However, many people do not understand the difference between polarized sunglasses and non-polarized sunglasses. In fact, the main difference between them is their functions.
What are polarized sunglasses?
In fact, polarized lenses can also be regarded as a category of sunglasses. Polarizers have an effect that ordinary sunglasses do not have. This effect is to effectively block and filter out all kinds of polarized light that are harmful to the eyes. The so-called polarized light is the irregular reflected light produced when light passes through uneven roads, water surfaces, etc., also called glare. When these rays of light irradiate human eyes directly, they will cause discomfort and fatigue. Also, people cannot see objects for a long time, and the clarity of the objects they see is obviously insufficient.(https://www.koalaeye.com/collections/polarized-sunglasses)
The polarizer uses the linear molecular arrangement inside its lens to filter and eliminate all kinds of glare that damage the eyes. That is, the polarizer reorganizes the irregular reflected light through the linear molecular arrangement in its lens and makes the light into the eyes clearer and more natural.
Why wear polarized sunglasses?
If you are a driver, it is best to wear polarized sunglasses when driving. Because you often encounters various glare during driving, polarized sunglasses can block part of the glare and filter out the glare reflected from the ground or the opposite car. In this way, the vision is clearer, the visual fatigue is reduced, and it is conducive to safe driving. The viewing angle effect of the polarized sunglasses is more natural and clearer than that of ordinary sunglasses.
Generally, people can use ordinary sunglasses for eye protection. And?polarized sunglasses can protect the eyes under certain conditions. Of course, it is better to wear polarized sunglasses for driving. In addition, when doing outdoor sports such as fishing, skiing, and vacationing, it is also more appropriate to wear polarized sunglasses. It is said that wearing polarized sunglasses in the sun is definitely more comfortable than wearing ordinary sunglasses.
The advantages and disadvantages of polarized sunglasses
1. Polarized sunglasses are manufactured according to the principle of the polarization of light. Long-term exposure to direct sunlight can also cause a rapid decline in vision, the formation of nearsightedness, farsightedness, astigmatism, or cataracts. The polarizer is to effectively eliminate and filter the scattered light in the beam. So the light can be input into the visual image of the eye on the transmission axis of the normal track, and the visual field is clear and natural.
The polarizer makes the scene look soft and not glaring, but the disadvantage of the polarizer is that the color is relatively single. The common colors are gray, gray-green, and brown, which cannot be made into a gradual effect. Therefore, the color matching of the frame is also restricted, and black, gray, or dark blue are often used as matching. Therefore, the aesthetics are slightly worse than that of non-polarized sunglasses.
2. From an optical point of view, the transmittance of the lens, that is the shade of color, should be selected according to the specific purpose. For example, if you are outdoors for a long time, darker color is suitable. For those with fewer outdoor activities, choose a lighter color. Gradient colors can also be worn. Improper wearing will cause visual fatigue and headaches. In addition, you must choose sunglasses with good-quality lenses. And it is found that the disadvantage of non-polarized sunglasses is precisely the advantage of polarized lenses. However, it is impossible to take both into account?at present.
3. In terms of function, the polarizer is more suitable for driving, water activities, skiing, and other occasions with more reflected light and glare. Especially when driving, using a polarizer can improve safety to a certain extent. Those with myopia can consider using a polarizing lens set or a polarizing clip, which can solve the refractive problem while taking into account the safety and comfort issues. For those who pay attention to decorative effects, you can consider ordinary sunglasses. Therefore, when choosing sunglasses, you must understand what your main purpose is.
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