Contact lenses are called contact lenses in medicine, which are lenses directly worn on the cornea. Although it adds a lot of points to the appearance, it may cause corneal friction due to improper operation. When wearing contact lenses, we must not rely on subjective feelings, find uncomfortable before we think of taking them off. We must strictly control the length of wearing contact lenses, in order to maximize the safety of use.
Although theoretically, contact lenses should not be worn for more than 10 hours a day at most, we recommend that the wearing time be kept within 8 hours as much as possible. Because the contact lens surface is very smooth, not easy to stabilize the tear film, will evaporate water very quickly, coupled with the lens cover on the cornea affect oxygen exchange, so wearing time is directly related to the health of the eyes, and the higher the degree, the more should be correspondingly reduced wearing time.
If you are a novice wearer, in view of the adaptation period of the cornea, and in order to reduce the appearance of foreign body sensation, you can increase by 2 hours every day and gradually use contact lenses. If you don't wear contact lenses for a long time and then start wearing them again, it usually needs to be readjusted.
Long-term wear of contact lenses can significantly increase the risk of eye diseases such as keratitis. Because long-term continuous use of contact lenses, the cornea has been in a state of hypoxia, easy to cause corneal edema and reduced resistance, if the invasion of bacteria at this time, may form keratitis, corneal ulcer or even blindness.
With contact lenses and a pair of frame glasses, it can help to control the wearing time more effectively. When frame glasses and contact lenses are used alternately, they can give the cornea proper rest and reduce the chance of discomfort and infection.