It is a common knowledge for almost everyone that some rays, like UV rays ( Ultra Violet ) in sunlight are harmful to skins, but the truth is that while those rays constitute a risk to our body health, they also pose dangers to our eyes, although the sun is over 93 million miles away. This is the reason why people who often go out for a long period wear sunglasses for protection.
But there is always a misunderstanding among the mass that eyes can only be damaged in a sunny day. The fact is that although it is cloudless outside, the sun is hanging in the sky as well but behind the clouds, and it also produces ultraviolet radiation in the form of UVA and UVB rays. This is why some people who are sun burned would wonder why since they are not laying on a beach on a cloudless day.
In addition, damage to eyes comes from other things as well, such the glare and reflections, especially when you are around water, sand, and even snow.
Therefore, you are suggested to wear sunglasses any daytime outdoor. However, some people would ask how do sunglasses protect our eyes.
The reasons lie in the coating and lenses applied. Sunglasses are tinted various colors, each color tint functions to certain type of light. The tint or coating functions specially effective to the UVB rays, which are the rays that are most dangerous to our eyes. With coatings, UVB rays are hard to pass through the lenses. Besides the coating, the special designation of sunglass lenses contributes greatly to the harmful rays prevention as well. This is why the normal lenses we usually wear do not have a function to protect damaging rays.
Besides, sunglass lenses are designed with anti-reflective coating to cut down glare and reflections from water and snow, etc.. The glare and reflection prevention poses a great benefit to the drivers and players who engage in water and snow sports.
But it does not mean that all the so called ” sunglasses “, those whose lenses are tinted, are able to block UVA and UVB, because in today’s market, there are a lot of unqualified sunglasses, which not only have no effect on harmful rays prevention, but also have side effect to our eyes. Therefore, when you buy sunglasses, you should ask the person who sells it what they are rated for. It they say they do not know, to a great degree the sunglasses they sell are not well qualified and then you should turn some other stores until one of the shop keeper tells your which offer the best protection.
Our eyes are vulnerable. We should carefully treat them. Thus, whether your travel plans include a vacation at home or a trip to distant shores, make sure your travel wardrobe includes a good pair of prescription sunglasses. This is something as important as sunscreen which protects our skin from the damaging rays of the sun, sunglasses, well qualified sunglasses help protect our eyes from those same damaging rays.
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