A Handbook For Selecting Sunglasses

Sunglass has become an essential fashion item, and they would crazy to buy a wide variety of sunglasses. What should we pay attention to for better protection of the eyes when buying eyewear?

Do not buy acrylic lenses that are easy to deform due to heat, the best choice is glass material or resin. Glasses should ride down on bridge of her nose and ears submissively. If it leans against one side, you need to adjust at once. In addition, the eyelashes away from the lens is also one of the standards in measurement.

Don't choose sunglasses with small lens, which have worse effects in preventing optical lines. You should observe the glasses carefully to know if there are scratches, impurities, bubbles, stripes. And check the packaging of bifocals, the standard sunglasses should be marked with the formal name, color, diameter, quality levels, production factory name and trademark. There should be anti-UVA, UVB, and CE mark on the lens or hangtag in order to ensure a certain degree of UV separation.

The glasses should be flat, and the transparency degree should be high. The materials that can make the sun glass is glass and resin, and the best sun glass should choose polarized lens. In addition to the skin colour, face type and clothing, you should choose sunglasses according to the occasions.

In general, black, brown, gray have a good effect in filtering light. The gray lenses can absorb any chromatographic balanced. The scene you see after wearing glasses will only become dimming, but will not have an obvious color difference. Tawny lenses are able to filter out a great deal of blue light and improve visual contrast degree and clarity degree, in a seriously polluted environment or foggy circumstance, tawny lenses will have a particularly good effect.

At the beach, on strong light reflective snow ground and in strong sunlight, you should wear sports-type sunglasses, Most of them use the bright saturation color which can absorb or reflect more visible light.

In addition to relieve the glare's stimulation for comforting the eyes, the main purpose of wearing reading glasses is to prevent the eyes from ultraviolet damage. However, the colour of lens are not relevent to ultraviolet radiation. Even though the lens have dark colour, it is not certain that the prevent UV effectively. So you must choose lenses marked the function of preventing UV. Usually, the UV index of sunglasses is from 96 to 98 percent.