Do I have to buy polarized sunglasses for summer travel?

u003cbru003eMany people know that sunglasses have the function of resisting ultraviolet rays in the sun. As summer approaches, sunglasses have become one of the essential elements in our lives. Friends of the editor will also ask if it is necessary to choose polarized sunglasses when traveling? Today, the editor will satisfy your curiosity. What is the difference between ordinary sunglasses and polarized sunglasses? How to choose between ordinary sunglasses and polarized sunglasses? Recommended reading: The usefulness of polarized sunglasses For most people, buying a pair of dark sunglasses in summer can prevent ultraviolet rays and protect the purpose. In fact, this idea is wrong. Ophthalmologists pointed out that the effect of summer polarized sunglasses is better than ordinary sunglasses. Why is the effect of polarized sunglasses better than ordinary sunglasses? This starts with the characteristics of natural light. Natural light is also called non-polarized aurora. They are composed of some electromagnetic waves that can vibrate in a specific direction. Therefore, after natural light passes through the filtering of the polarizer, it can only pass in one direction. Polarized sunglasses are based on this characteristic of natural light to block harmful light. No matter what object the sun shines on, it will produce some harmful rays due to reflection or refraction. Polarized sunglasses can completely absorb these rays, reducing the damage of these rays to human eyes. Ordinary sunglasses do not have this function. Their lenses cannot filter light, so they only reduce the intensity of strong light and ultraviolet light, but they are powerless against harmful light. Therefore, ordinary sunglasses can only reduce eye damage. Even so, the biggest advantage of ordinary sunglasses is that they have the popularity that polarized sunglasses do not have, so they are favored by many online eyeglasses. And sunglasses are not only worn on sunny days. Sunglasses are divided into shade sunglasses, color sunglasses and special purpose sunglasses. Generally, colored sunglasses can be used for clothing matching all year round, and sun-shielded sunglasses can also be worn all year round! Even if it is cloudy, it is recommended that you refer to the UV index of the day to determine whether to wear sunglasses!

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