Recently, a woman who has been wearing contact lenses for a long time felt a sharp pain in her eyes, and developed symptoms such as red eyes, dry eyes and phobias. After medical treatment, a hospital ophthalmologist found that the woman's cornea appeared edema, hypoxia. The woman was eventually diagnosed with double eyelid limitis, conjunctivitis, and binocular dry eye. Fortunately, due to prompt treatment and medical attention, these symptoms did not affect her vision too much. Coincidentally, in recent years, there have been frequent news of eye diseases caused by improper wearing of contact lenses. Some cases are far more serious than the woman's symptoms, and some people even appear to be on the verge of blindness.

  This has led to concerns not only about the safety of contact lenses, but also about how to wear them healthily and scientifically.

  The doctoral supervisor of the School of Ophthalmology, the director professor of Aier Ophthalmic Corneal Disease Institute, said in an interview with a reporter of Science and Technology Daily that long-term, long-term wearing of contact lenses is easy to cause corneal hypoxia, resulting in lactic acid accumulation in the eye, corneal epithelial cells are damaged, the eye resistance is reduced, and then cause a variety of eye inflammation. In addition, when wearing contact lenses, protein, mucin and   other  sediment in tears will adhere to the lens, becoming a hotbed for the growth of fungi and bacteria. "If the lenses are not properly cleaned during use, they are prone to infection." Li Shaowei said.

   So, how to choose and wear contact lenses healthily and scientifically, so as to avoid them becoming the "invisible killer" of health?

  In the choice of contact lenses, to choose compliance, high-quality contact lenses, but also should try to choose simple, colorless ordinary contact lenses, can not wear expired contact lenses. Lee said, Consumers should buy contact lenses from licensed medical device companies, not from illegal products.

   The doctor said he needed to go to the hospital for an eye examination before wearing contact lenses for the first time. Before the lens, to carry out dilatation optometry in advance, choose the right degree of contact lenses. Li suggested that contact lens wearers should have a professional optometry and eye health check every six months to monitor changes in the strength of the glasses.

   When wearing contact lenses, it is important to control the wearing time. According to Li, contact lenses should not be worn for more than eight hours on a daily basis, and then they should be removed to give the eyes plenty of rest and relaxation. If your eyes become uncomfortable while wearing contact lenses, stop wearing them immediately.

  In addition,  the doctor suggested that the following four groups of people, including office workers or students who use their eyes for a long time, traffic police or physical education teachers who regularly take part in indoor and outdoor sports, pregnant or nursing women, and patients with acute infections of the eyelids, conjunctiva and cornea, should try not to wear contact lenses.