Sunglasses

In the summer, our eyes, like our skin, need special care. So please choose the right glasses you just need

In the summer, our eyes, like our skin, need special care. The cornea and crystal eye are almost completely absorbed by ultraviolet rays, and their small part reaches the retina. As a result, the surface layer of the cornea can get a serious burn. Also, the impact of ultraviolet on the lens of the eye can lead to cataract, and impairment of sight. Very important in summer, sunny days take care of their eyes.

It is very important to choose the right defense. Today there are a large number of sunglasses. Diverse brands, models, lenses. But not everyone fully protects our eyes from radiation.

How to choose the right to choose sunglasses so that they are not only stylish, but also saved our eyesight from the harmful effects of the Sun?!

It is paramount to protect the material not only from light, but also from ultraviolet. There is a very common myth that the darker glasses, the greater the degree of protection.

It’s far wrong. The protection against ultraviolet is not in the intensity of the color of the glass, but in passing through the wave lens.

If the lenses do not miss light, but passes ultraviolet, it is fraught with serious consequences.

The pupil reacts to the low intensity of the light, expanding, resulting in the eyes of a larger number of ultraviolet rays. So safer walk without sunglasses than in such.

Material of sunglasses

Material must be paramount in the choice of sunglasses. It is he who protects our eyes from the adverse effects of the Sun. The traditional material for glasses is the glass. But now widely used in the manufacture of plastic, polycarbonate materials.

Thanks to modern technologies, in our time, plastic is not inferior to the glass. In their composition
Particular particle filters that block a large amount of ultraviolet. Select modern plastic, or classic glass, choose from you.

As for glass lenses, they not only provide excellent protection, but also do not distort the world around, unlike plastic.

Also glass is more resistant to scratches. But the disadvantages include their fragility, and glass, harder, plastic. Such glasses are advised to wear in special solid covers.

Good high-quality plastic can be a good alternative glass. Now in the manufacture of special additives add to it and special coatings are applied.

Thanks to this, they are also effective to protect. Such glasses are very light, less fragile, more practical. But such glasses, unfortunately, are more susceptible to scratches, and sometimes a little distorted objects.

Dark or bright lenses?

For everyday life, there is no average dark sunglasses, with light 50%. Excessively darkened lenses tire eyes. It is very important to wear sunglasses, experience comfort.

With more intense color, darker glasses are well suitable for relaxing on the beach under the bright sun, then your eyes will be more comfortable.

Degree of protection of glasses

There are certain categories that subdivide sunglasses according to the degree of protection.

• Cosmetic (cosmetic). These are glasses with a rather low degree of protection. In such glasses goes
  more emphasis on beauty than functionality. They are more fashionable accessory;
• GENERAL. These are good sunglasses endowed with the necessary protection. They are well suited for the middle strip of living;
• HIGH UV-PROTECTION. These are sunglasses with an increased degree of protection. They are intended for intensive holidays on the beach, trips to Equatorial-tropical countries.

The degree of bandwidth of ultraviolet rays

All sunglasses must be equipped with a special label in Russian, where the necessary information is available. There is a law of the Russian Federation on this topic «On consumer protection».

The shortcut of good sunglasses should be the% percentage of blocking UVB and UVA rays. Sometimes they write the maximum wavelength, which the lenses are blocked. If there is written on sunglasses that they do not miss the waves to 359 nm, then these glasses are missing some part of the near ultraviolet, and the protection will not be complete. To check the protective ability of your points, contact the Optics Salon, where there is a special device.

Take care of your eyesight!