April 05, 2016, 08:51
Spring has come, the sun is getting hotter and hotter every day. It’s time to think about protecting your eyes from UV rays. Which lenses to choose: plastic or glass, dark or light? Many give in to the first impulse and choose sunglasses, evaluating the accessory only externally. Is this true?
Plastic or glass?
It turns out that glasses with tinted lenses do not always indicate protection from external factors. First of all, this applies to plastic lenses. Any plastic passes up to 100 percent of ultraviolet, even being black! Another nuance, the darker the glass, the more dangerous it is for health. In bright light, the pupil of the eye narrows to reduce the risk zone of a potential mucosal burn. This is how our body works and this is a natural defense against external influences. And in cheap dark glasses without ultraviolet filters, the pupil remains “deceived”. It does not narrow, taking on the full sunstroke.
Another drawback: plastic lenses scratch easily. Carrying them in a purse without a case is very, very impractical. In addition, plastic can warp in extreme heat.
It would seem that glass has more advantages. Indeed, unlike plastic, glass does not transmit ultraviolet radiation, even if the lenses themselves are transparent. You can safely choose glasses with minimal shading and be calm about the health of your eyes. It will get warmer very soon and many will begin to get out on picnics, closer to the reservoirs. Glasses with polarized lenses in addition to ultraviolet will neutralize glare on the water. Their color should be dark green or gray. In size, the most correct glasses with large glasses that make a person look like a dragonfly or a skier. Such models protect not only the eyes, but also the skin of the face, on which “crow’s feet” form from ultraviolet radiation. Another advantage of glass sunglasses is that glass lenses are less prone to scratches.
It turns out that even cloudy weather is not a reason to refuse to wear sunglasses. Experts say that a sufficient amount of UV rays that are harmful to the eyes pass through the clouds.
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The opinion of the editors may not coincide with the opinion of the author of the article.