Plastic or glass: which sunglasses protect better

16.06.2024/00/20 XNUMX:XNUMX    14

There is an opinion that plastic sunglasses are useless and only harm the eyes. Today we will tell you how to choose the right glasses for sun protection and whether the color of the lenses affects the level of protection.

Excess flow of ultraviolet radiation harms the eyes. It negatively affects the internal structures of the eyes: the retina, which are nerve fibers on the inner side of the vitreous body, and the lens, a biconvex lens that "projects" and focuses rays on the retina. The consequences can be cataracts (clouding of the lens), macular dystrophy (damage to the central area of ​​the retina) and other visual impairments.

Tinted lenses in glasses are good protection against bright sunlight, but not all of them are able to protect against UV rays. Products with a special UV filter become a reliable barrier to harmful radiation. Such glasses have a special blocking coating, or the lenses themselves contain UV absorbers.

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Another, no less effective way to protect the eyes from ultraviolet rays is to use glasses with plastic lenses. This material can absorb 98-100% of harmful radiation. From the huge range of models, try to choose glasses with polycarbonate lenses - they are better than others for spending time outdoors. For people with visual impairments who use corrective glasses, there is a great opportunity to order "chameleons". Ultraviolet activates their photochromic ability. At this time, they darken, blocking UV rays. And indoors they become transparent again.

When choosing a suitable model, pay attention to the following points:

  • Product marking: the best option is glasses with a UV400 mark. The smaller this value, the worse the products protect against UV radiation. There are models indicating different types of UV rays: UVA (long-wave rays that can penetrate clothes, glass and cause pigmentation, symptoms of photoaging of the skin), UVB (they cause tanning, they can also cause sunburn).
  • Lens color: yellow blocks the blue spectrum of rays, which harms the eyes. In cloudy weather, at dusk, at sunset or dawn, they provide good visibility. But color rendering can still be distorted. You should not choose blue glasses. They pass the blue spectrum of rays. Red lenses cause rapid visual fatigue. It is also better to avoid them. The best option: green, brown, gray sunglasses.
  • Glasses should not "ride" on the nose. Pay attention to the fact that they do not press and do not sting. Barely noticeable discomfort turns into severe pain after a few hours of use.
  • Shape: Choose glasses that correct the shape of your face.
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Remember that the degree of darkening of the glasses does not affect their ability to block UV rays. It is important that they have UV filters