Directory:How to pick a safe sunglasses

Sunglasses are a form of protective eyewear designed primarily to prevent bright sunlight and high-energy visible light from damaging or discomforting the eyes. They also help cancel out harmful UV rays from the sun. They can sometimes also function as a visual aid, as variously termed spectacles or glasses exist, featuring lenses that are colored, polarized or darkened. In the early 20th century they were also known as sun cheaters (cheaters being an American slang term for glasses).Many people find direct sunlight too bright for comfort during outdoor activities. Healthcare professionals recommend eye protection whenever the sun comes out to protect the eyes from ultraviolet radiation (UV) and blue light, which can cause several serious eye problems. Sunglasses have long been associated with celebrities and film actors primarily from a desire to mask their identity. Since the 1940s sunglasses have been popular as a fashion accessory, especially on the beach.When the sunglasses have been widely used, how could we distinguish the safe or unsafe sunglasses. The unsafe sunglasses are still do harm to our eyes.Nowadays there are three major sunglass standards, which are popularly known mostly as a reference for sunglass protection from UV radiation; the standards do, however, also include further requirements. A worldwide ISO standard does not yet exist, but by 2004, attempts to introduce such standard have led to a respective ISO standards committee, subcommittee, technical committee, and several working groups. Sunglasses sold in the United States are regulated by the Food and Drug Administration and are required to conform to safety standards.And we also can know that different countries have different standard. But the European CE mark indicates that the glasses actually offer a safe level of Sun protection. It is the basic identification to approve the safe sunglasses products.Ray ban glasses to glass-based, strong shading effect, one hundred percent of all lenses are able to block harmful ultraviolet rays, infrared and other harmful while filtering light. Now use the polarizing film technology makes the light to reduce the damage to the eyes of many. Ray ban frame design and Whloesale Rayban is also good, no matter under what circumstances, can make people comfortable to wear.If you want to pick a sunglasses, you should check the safe identification first. Choosing the safe sunglasses is do good to your eyes.

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