What is the real function of sunglasses?

u003cbru003eAlthough the scorching summer is coming to an end, sun protection is still indispensable, especially sunglasses. At this time, some people will think that it is unnecessary. I can only say that you don't understand the real function of sunglasses. Nowadays, many people use sunglasses with concave shape, or use sunglasses for sun shading. Many people think that the real function of sunglasses is to prevent ultraviolet rays. So before you wear sunglasses, you might as well understand the real function of sunglasses! One of the main functions of sunglasses is to filter ultraviolet rays. Excessive ultraviolet (UV) exposure in the sun can cause diseases such as cataracts, pterygium, eyelid skin cancer, and electro-optic ophthalmia. Even if you wear a hat with a wide brim, it can only block 50% of the ultraviolet rays reaching your eyes, so you need to wear sunglasses. Recommended reading: How to distinguish whether sunglasses are UV-resistant and sunglasses can also filter short-wavelength blue light. Studies have found that long-term exposure to ultraviolet and short-wavelength blue light is a risk factor for age-related age-related macular degeneration (AMD). In addition, comfortable visual experience is also one of the important factors for wearing sunglasses. The harsh sunlight will make the eyes uncomfortable and affect the clarity of vision. People will squint and shed tears. Wearing sunglasses will greatly increase the comfort. Those who wear sunglasses, don’t treat sunglasses as fashion accessories, understand their true function, and don’t lose too much for a small amount of money. Related reading: The choice of sunglasses
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