Summer, many people wear sunglasses up, and some also put on the glasses photochromic lenses, eye wear all day. And some young men in pursuit of fashion, the sunglasses as an ornament, regardless of where, separated from the eye lens, the passage of time will make the vision loss, blurred vision, cause severe headaches, dizziness, blurred vision and can not be long as the and other symptoms. Medical experts will be the symptoms referred to as "sunglasses syndrome." This condition reflected a variety of discomfort, such as early in the area around the eye near the nose, a clear sense of numbness and tingling, breathing symptoms become more pronounced, much like the common cold, and feel like a small insect crawling away in the face maxillary gingival numbness, home teeth discomfort, local skin inflammation caused by poor blood circulation, eye soreness, decreased visual acuity.
    Anatomy and physiology that has a small hole in the bottom of the eye, called the infraorbital foramen, the hole has a major nerve branches, namely the trigeminal nerve infraorbital nerve. It is located between the eye fissure crack in the mouth and nose of the skin, in charge of sensory function. Because of the weight and mirror sunglasses focus ring infraorbital nerve compression, nerve distribution area will lead to discomfort, wear sunglasses more in 2-3 weeks later.
    Sunglasses to prevent SARS, first, to select the correct and rational use of sunglasses. Do not choose a large frame glasses. Because such frames are mostly imported, is based on foreigners face design, and our adult double the distance the pupil is less than the import of a large majority of the optical center distance glasses, wearing eye glasses will greatly increase the regulatory function the burden of damage to eyesight. The street stalls selling cheap sunglasses, making very rough, lens thickness varies, the color is not uniform, optical performance is poor, wear a lead after the headache, eye pain, fatigue, discomfort, often wear sunglasses that bad, easily lead to vision loss. Secondly, try not to wear large sunglasses. When wearing glasses must be worn shorter time, pick a mirror along with the palm after the Orbital, nasal side massage 10-20, in the event sunglasses syndrome, they should stop wearing.
     In addition, short-sighted people if you want to wear sunglasses, glasses clip tool can be used while wearing sunglasses and myopia to wear color lenses or myopia.