zhdety's fashion blog

In selecting sunglasses, most people just stay in the aesthetic considerations. They think the sunglasses are just fashion accessories. They regard the fashionable look of them as the first important thing. That’s why you can see there are so many clothing stores are also equipped with the fashionable sunglasses for the customers to choose from.

While the sunglasses are functional accessories, the protection of them are most important thing. Because without the function of blocking the ultra violet radiation, there will be damages to the eyes. As a result, if you wear a poor pair of sunglasses without correct protection function, they will cause damages to eyes. Therefore, it is so important to choose a suitable pair of quality sunwears.

The protective sunglasses are in various types. Generally speaking, they can be divided into the following categories. Anti-reflection lenses: in order to prevent light reflection of the lenses surface, they can be coated with a piece of coating, no matter for the sunglasses of the ordinary prescription glasses. The lenses are usually coated with a thin layer of magnesium fluoride, and its thickness is the light wavelength. Because of the different colors of the visible light, the wavelengths are also different. A part of light will be reflected by the lenses. When you hold glasses and observe under the light, you can see the reflection of light may be green or purple. You do have anti-reflective coating on the lenses, and anti-reflective lenses can make images clearer, free from light interference.

If you drive at night, the opposite light makes you feel dazzling, it is necessary to get the anti-reflection coating glasses. Tinted sunglasses are quite popular with the wearers. The lenses of them are colored. Some chemical materials are added into the lenses to get special function. That is the coming of the sunglasses.

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