A lot of friends in the summer like to wear oakley sunglasses all day, especially young friends, even the sunglasses as a fashion ornament, regardless of place of occasions, has been picked, but for a long time wearing after vision loss, blurred visionmore occurrence of headache, dizziness, vertigo and other symptoms appear. There are even vision loss and the carrera sunglasses for men soreness, skin inflammation and other symptoms. These are known as: sunglasses syndrome. Why these symptoms occur. First of all: the large frame sunglasses optical distance from the center than the distance of the normal adult pupil. Therefore, the glasses to see the target, you need than usual, the greater workload, long way. Back sunglasses syndrome. Secondly, in our ran ban glass, hair has a physiological holes, which has an important branch of the nerve, because the weight of the sunglasses is the focal point and mirror circle larger than myopia, a long time to wear can cause nerve cause skin numbness, dull, and visual fatigue. How to prevent this problem? First the right choice to use porsche carrera sunglasses. Generally do not choose the broad framework, this framework is not suitable for people face, especially the little face friends. This framework, the import framework, based on their national human face design, we the people, the majority of pupillary distance less than the distance of the optical center of this box. Long-term wear will increase the load of the eye regulatory function, resulting in visual impairment. The other is the discount oakley sunglasses on to spread this beautiful, but rough work, poor quality lenses, color is uneven. Almost no optical performance! Be careful to buy! Secondly, at the time of purchase to try them. To see if the dizziness, headaches and other symptoms. Also check if there are stripes, impurities and air bubbles in the glasses lens. In addition to shorten the time to wear sunglasses, after use, use the palm of your hand along the eyes and nose massage, the number of about 15-20 times, ease eye fatigue. If there is not suited to immediately stop wearing!