Lightweight and aesthetically pleasing, contact lenses can bring great convenience to nearsighted patients, but not everyone is suitable for wearing contact lenses, and some people may also suffer from eye injuries. What group of people should not wear contact lenses? 1, fever and cold people. The local resistance of the eye decreases when you have a fever and cold, tear secretion decreases, the cornea metabolizes poorly, which in turn affects your vision. 2, people with allergies. Allergic people wearing contact lenses are prone to complications such as eye itching, redness and swelling, and if these conditions are not treated in a timely manner, they may endanger vision. 3, people with eye diseases. Such as keratitis, conjunctivitis, glaucoma, dry eye, trachoma and other eye diseases are not suitable for wearing. 4.Pregnant and menstruating women. At this time, women’s hormonal secretion changes, eye pressure, the body’s water content also changes, wearing contact lenses will have a negative impact on the eye. 5. People over 40 years old. Should gradually say goodbye to contact lenses, because at this time the human eye tissue will occur more obvious degenerative changes, the eye local resistance to decline, especially the eye’s ability to tolerate oxygen deprivation decreased. So, 40 to 60 years old people can wear for a short time, more than 60 years old is best not to wear. 6, cycling long distance travelers. Long distance cycling, air accelerated convection, will make the soft contact lens moisture reduction, the lens gradually dry hard, will damage the cornea, causing eye pain or bacterial infection. 7, people who work in a poor environment. Such as workplaces with volatile acids and bases, soot and dust. Bad environment, foreign bodies into the eyes, will cause eye discomfort, it is easy to cause eye inflammation. 8, in the growth and development of primary and secondary school students. The youth in the growth period, the eye axis has not been shaped, myopic astigmatism is unstable, change faster, and adolescents poor self-care, do not pay attention to hygiene, for contact lenses strict requirements of cleaning and disinfection and wearing procedures are not easy to grasp and adhere to, easy to cause eye infection and injury to the cornea. Therefore, adolescents should wear contact lenses with caution. 9, extremely sensitive people.