In the previous article, we discussed “The Trend Of Tortoise Sunglasses“. In this article, let’s talk about “What is the difference between polarized sunglasses and non-polarized sunglasses?”.
The damage of ultraviolet rays to the human body is cumulative, which means that the longer the exposure to the sun, the greater the damage of ultraviolet rays. When choosing sunglasses, many people have a misunderstanding that the darker the lens, the stronger the anti-ultraviolet effect. On the contrary, the darker the color, the larger the pupil will be. If it is not a safe anti-ultraviolet lens, the more ultraviolet rays will be irradiated to the eye and the more severe the damage will be. Therefore, it is best to confirm that the lens can effectively block more than 99% of ultraviolet rays. At the same time, it must have polarizing characteristics to eliminate glare from the strong light. Therefore, polarized sunglasses are now becoming more and more popular. So, what is the difference between polarized sunglasses and ordinary sunglasses?
Polarized vs non-polarized sunglasses
From the appearance of ordinary sunglasses and polarized sunglasses, the naked eye cannot tell the difference. However, ordinary sunglasses can only reduce the intensity of the light, and cannot effectively remove the reflection of the bright surface and the glare in all directions. Polarized sunglasses can completely block the glare caused by various factors such as scattering, refraction, and reflection due to their polarizing properties. Also, they can block the ultraviolet rays that are harmful to human eyes, so that when people are having activities under strong light for a long time, their eyes are not easy to get tired. These polarized sunglasses not only can truly protect the eyes but also can see things more clearly and three-dimensionally.(https://www.koalaeye.com/collections/polarized-sunglasses)
How do polarized sunglasses work
The polarizer is made according to the principle of the polarization of light. We know that when the sun shines on the road or water, it directly irritates the eyes, making the eyes dazzling, fatigued, and unable to see things for a long time. Especially when you are driving a car or engaging in outdoor activities, it not only affects our work and entertainment mood but also affects our judgment of objects and causes danger. Long-term exposure to direct sunlight can also cause rapid vision loss, resulting in myopia, hyperopia, astigmatism, or cataract. The special effect of the polarizer is to effectively eliminate and filter out the scattered light in the beam, making the field of view clear and natural. Just like the principle of blinds, the light is adjusted to the same direction and enters the room so that it makes the light soft and not dazzling.
Features of Polarized Sunglasses
Filter out more than 99% of ultraviolet rays in sunlight, and the filter performance meets the requirements of international standards.
Have the function of effectively blocking strong light.
The lens has a standard optical arc design to form an optical visual axis to produce a visual image.
The glasses frame is firm with excellent materials, and it has an optical function design providing comfortable and safe wearing.
Polarized sunglasses lens is a composite material, generally composed of seven layers. The outer two layers are anti-wear, and the second and sixth layers are UV resistant, and the third and fifth layers are to filter harmful rays. The middle layer is the polarizing layer. Polarized lenses have good anti-ultraviolet effects, but they are easy to scratch, so pay attention to protection.
If you are a driver who often drives, it is better to wear polarized sunglasses when driving. Because various glare enters eyes during driving, polarized sunglasses can block some glare and filter out the strong light reflected from the ground or the opposite car body, so as to make the field of vision clearer, reduce visual fatigue, and help safety drive.
Only need to wear sunglasses in summer?
To avoid damage to the eyes caused by ultraviolet rays, it is of course necessary to minimize exposure to strong sunlight, especially between 10 am and 2 pm, when the sun is directly on the surface of the earth and the ultraviolet intensity is high. Especially those ultraviolet rays reflected from concrete, snow, beach, or water are powerful and cause great damage to the eyes, but they are easily overlooked. Therefore, if you want to be active in these places for a long time, remember to wear appropriate polarized sunglasses.
Sunglasses are not only required to be worn in summer, in fact but they must also be used throughout the year. Wear it on sunny days and also on cloudy days. Don't think that no need to wear sunglasses when the sun is not strong on cloudy days and the weather is not hot. In this case, you will be exposed to more harmful ultraviolet rays. Therefore, even if it is a cloudy day with thin clouds, you must still refer to the UV index forecast to prepare for sun protection.
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