To judge the merits of sports glasses from both the quality and aesthetic look. Aesthetic with personal factors, the quality is there’s a certain standard. Sports glasses mainly refers to the quality of the lens quality. Currently the world’s universal standard for the United States Food and medicine Health Inspection Service (F • D • A) standard.
First, according to F • D • A standard lens, while protecting the light transmission rate, it is necessary to filter out the sun’s ultraviolet rays than Qing, when the 100% UV filter should be posted “UV a 400PROTCT10N” label, so view lens The Uv label is important.
Second, the lenses cannot have optical lenses only “degrees”. Generally if diopter for more than 15% pads would have felt dizzy.
Third, the lens must have relatively high strength and impact resistance. In General, sport optics are using PC tablets (commonly known as the space movie) will not chip not crack the impact resistance.
Spring and autumn, selected lenses has a shallow, box color staid sport optics; winter selected picture frame color to purple. Winter selection box larger sport optics to wind.