Hello, wearing contact lenses has both advantages and disadvantages, because contact lenses can not be seen when you wear them, it looks like you are not wearing glasses. Because there are its benefits and disadvantages, if long-term wear contact lenses harm, mainly including the following points:

One, cause dry eye: contact lenses usually lead to a decrease in oxygen permeability, some patients in order to pursue the beautiful and choose the pupil lens, the pupil lens covers the cornea area than the ordinary contact lenses are also larger, so the cornea's oxygen permeability is also a little bit worse. The cornea because of the poor oxygen permeability and then trigger hypoxia, can lead to local inflammation, these factors can make the stability of the lining decreased, thus promoting the occurrence of dry eye, in the choice of contact lenses, try to choose daily disposable or monthly disposable contact lenses. In addition, care is also very important. If care is not proper, the oxygen permeable pores of contact lenses can be easily blocked by proteins, which can lead to a persistent decrease in oxygen permeability and can trigger or aggravate dry eye. Contact lens wear is generally not recommended for patients with dry eye, especially those with severe dry eye. If you experience increased dryness while wearing contact lenses, you need to seek medical attention, and you need to suspend the use of contact lenses.

Two, resulting in corneal punctate epithelial stripping, infection: long-term contact lens wear will be due to corneal hypoxia, can not complete the normal metabolism, easy to trigger corneal inflammation and other diseases, at the same time can lead to corneal epithelial punctate stripping. If you don't pay attention to the care or disinfection is not complete during the wearing period, it may cause corneal infection.3. Increase the risk of infection, because contact lenses have a certain damage to the corneal epithelium, when the corneal epithelium is incomplete, contact with bacteria, viruses, amoebae can lead to infections, the more common is bacterial infections. If you wear contact lenses for a few days in a row, especially at night without taking off, forget to take off after the eyes will be found red, pain, fear of light, tears or pus discharge, there may be bacterial infections, more dangerous, for the sake of eye health, it is best to wear contact lenses, usually pay attention to the cleaning and disinfection of the lenses, in order to protect the eyesight, not too much to advocate the long-term wearing of contact lenses.