Recently, a woman who has been wearing contact lenses for a long time suddenly felt that her eyes were very stinging, and she had red eyes, dry eyes, photophobia and other symptoms. After seeing a doctor, an ophthalmologist in a hospital found that the woman's cornea was edematous and anoxic. The woman was finally diagnosed with bilateral blepharitis, bilateral keratoconjunctivitis and bilateral dry eye. Fortunately, due to the timely treatment and treatment, these diseases did not cause too much negative impact on her vision. Coincidentally, in recent years, the news of eye diseases caused by improper wearing of contact lenses is not uncommon. Some cases are far more serious than the woman's symptoms, and some people are even near blindness. This not only led to people's concern about the safety of contact lenses, but also led to thinking about how to wear contact lenses in a healthy and scientific way. Professor Li Shaowei, doctoral supervisor of Aier Ophthalmology College of Central South University and director of Aier Ophthalmology Research Institute, said in an interview with Science and Technology Daily that wearing contact lenses for a long time for a long time is likely to cause corneal hypoxia, which will lead to accumulation of lactic acid in the eyes, damage to corneal epithelial cells, and decline in ocular resistance, leading to various ocular inflammation. In addition, when wearing contact lenses, the sediment in tears, such as protein and mucin, will adhere to the lens and become a hotbed for the growth of fungi and bacteria. "In the process of use, if the lens is not well cleaned, it is prone to infection." Li Shaowei said. So, how to choose and wear contact lenses in a healthy and scientific way to prevent them from becoming a healthy "contact killer"? In the selection of contact lenses, we should choose compliant and high-quality contact lenses, and try to choose simple, colorless ordinary contact lenses. We should not wear expired contact lenses. Li Shaowei said: "Consumers should purchase contact lenses from medical device manufacturers with business licenses, and should not purchase irregular products." Li Shaowei said that before wearing contact lenses for the first time, you need to go to the hospital for an eye examination. Before matching glasses, mydriasis optometry should be carried out in advance, and contact lenses with appropriate degrees should be selected. Li Shaowei suggested that when wearing contact lenses, professional optometry and eye health examination should be carried out every six months to monitor the changes of the glasses' degrees in a timely manner. When wearing contact lenses, be sure to wear them properly. Li Shaowei said that, generally speaking, contact lenses should not be worn for more than 8 hours on a daily basis, and then contact lenses should be removed to allow the eyes to get full rest and relaxation. When wearing contact lenses, if the eyes feel uncomfortable, you should stop wearing them immediately. In addition, Li Shaowei suggested that the following four types of people, including office workers or students who use their eyes for a long time, traffic policemen or sports teachers who often participate in indoor and outdoor sports, women in pregnancy or lactation, and patients with diseases such as acute infection of eyelids, conjunctiva and cornea, should try not to wear contact lenses. (Outlook New Times)