Do you wear contact lenses often? If you wear contact lenses for a long time, you will have more or less eye complications, such as: giant conjunctival papillae, tear film abnormalities, corneal epithelial and morphological abnormalities and sensitivity loss, corneal ulcers, corneal edge neovascularization, ptosis, residual astigmatism, near point distant shift, visual fatigue, etc. In addition, some syndromes will occur, such as acute lens tightness syndrome, acute corneal hypoxia syndrome, acute prolonged lens wear syndrome, etc. syndrome, etc. When complications occur, you may experience eye pain, congestion, vision loss, etc. There are many advantages of wearing contact lenses, good corrective effect of vision, wide field of vision, not easy to play down, do not affect the natural elegance of people, so by some people who do not want to wear lenses, but contact lenses are attached to the surface of the cornea, the cornea more or less some stimulation, hard contact lenses irritation, need a long time to adapt. Usually the cornea is directly exposed to the air, absorbing oxygen, expelling carbon dioxide, active metabolism, wear contact lenses, it hinders the metabolism of the cornea to varying degrees, so contact lenses should not be worn continuously for many days. Although hydrophilic soft lenses have a better ventilation function, but worn for a long time, will be because of the absorption of protein and fat in the tear fluid, so that the ventilation gradually weakened, but also prevent the nutrition of the cornea. Corneal and contact lens contact, sometimes cause epithelial damage, bacteria take advantage of the situation, the occurrence of corneal inflammation, soft contact lenses for polymer, mesh porous, have a good hydrophilic, bacteria are easy to breed in it, become a source of infection, is the main danger of wearing contact lenses. Cases of corneal ulcers caused by wearing contact lenses have been reported in Beijing, Tianjin, Shanghai and Zheng. In some cases, serious Pseudomonas aeruginosa corneal ulcers occurred, resulting in large corneal cloudiness and severely impaired vision, which became a painful lesson. You must be very hygienic when wearing contact lenses, have good hygiene habits, wash your hands first every time you take them off, wash them carefully after taking them out, disinfect them carefully, take them off at the prescribed time, and do not extend the time arbitrarily. In the process of wearing lenses, you should regularly go to the hospital eye examination eye condition. After the contact lenses are worn often, the cornea is dulled, there is a problem is not felt, only by the doctor’s examination, corneal staining, in order to timely detection, for early treatment. If you have symptoms such as tearing, photophobia, soreness and foreign body sensation when wearing lenses, you should immediately take out the lenses and rest for a while, if the symptoms do not disappear quickly, you must go to the ophthalmologist as soon as possible without delay. Those who need to wear contact lenses: people with refractive error in movies, ballet and various professional actors, people who cannot wear ordinary glasses because of their profession, athletes who are engaged in more dangerous projects, chefs and textile workers who cannot make good use of glasses because of water vapor, etc. People who have the so-called spectacle phobia (glass complex), who always feel that glasses will bring obstacles to beauty and affect their life and social activities, will feel very comfortable and relaxed with contact lenses and have better refractive correction. People with conjunctivitis, keratitis, minimal tear secretion or transient movement, people with diabetes and other systemic diseases, people with low resistance are not suitable for wearing contact lenses, people with more dust or chemical irritants in the working environment and those with poor personal hygiene are not suitable for wearing contact lenses.