sunglasses: how to choose?

as soon as the snow melts and the sun is brighter and often fills the streets with its light, stores that sell sunglasses dramatically increases the number of buyers. How to choose armor from sunlight, we will tell the employee the Internet-shop http://myglass.in.ua/ where can you buy . So...

the

LENSES

Actually there are 2 Islands the form of lenses:

the

plastic;
glass.

"+" lenses made of plastic:

the

a variety of forms;
lighter than glass.

"-" lenses made of plastic:

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easier to deform and scratch in comparison with glass.

"+" lenses made of glass

the

durable.

"-" lenses made of glass

the

sometimes higher price;
heavy weight
a more conservative design;
more dangerous (they are easier to break than plastic).

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COLOR LENS

the Most safe to the human eye are colors like: brown, green, gray and their shades.

the

SOCKET

In the factory high-quality glasses equally safe will be both metal and plastic frames. But in the "budget" glasses frame, which is made of plastic, could be harmful to human health. Remember plastic can cause allergies, may be toxic and under the direct sunlight can quickly begin to deform. Poor quality frame of the metal can break very quickly, well, and her cover is simply oblast.

the

nose pads

There are 2-ve varieties nosophoros:

the

adjustable;
solid.

the

DOCUMENTS

On selling sunglasses, each seller must have a document issued by the Ministry of health of the country, which confirms the fact that these glasses actually protect your eyes from the sun. In addition, all branded model points are equipped with passport (the cheaper models it may not be). The passport specify the category points, and that they protect from UV radiation.

the

legend

For example, 100% UV protection or UV400 inscription (on the lens) means that this model points protects against harmful UV radiation.

On the earhook or in the passport also specify the category of points. In total there are 5 five categories:

the

0-I - pass 80 - 100% light;
1-I - flow 43 - 80% light;
2 lets 18 - 43 % light;
3 - pass 8 - 18 % light;
4th - misses a 3 - 8% light.

Translated by "Yandex.Translate": translate.yandex.ru.

Sunglasses: how to choose?