Many young people this summer are popular fashion wear a large sunglasses, and some are even able to cover Banzhanglian. On the 10th, the State Administration of Quality Supervision, Inspection issued glasses product quality sampling report said, oversized mirror sunglasses lens curvature due to the excessive number of people wearing long time may cause visual impairment.

This reporter visited the market found glasses, and people buy sunglasses widespread misunderstanding that the sunglasses-oriented style, quality and curvature of the lens size but do not care.
According to a hospital Hayida Eye Hospital doctors, as eyecare sunglasses, the bigger is not better, because people's face width is limited, and sunglasses, in addition to the width of the lens, but also with the cross of the intermediate support. If the lenses too much coverage in the face of the people and also have a change in curvature, under normal circumstances, within the arc of 10 degrees is safe. Once the lens and the curvature of more than 15 degrees, light lenses accept there will be changes in the refractive index, the greater the mirror curvature greater refractive index changes, such wear sunglasses, see things there will be rugged, long-term wear resulting in eyestrain and fatigue, dryness and damage eyesight.