It is generally recommended that people who wear contact lenses regularly should wear them for no more than 8 hours in a day, and in special cases, no more than 12 hours at the longest. However, for newcomers, it is advisable to wear contact lenses for 2-3 hours a day, and then gradually increase the wearing time, while not sleeping with contact lenses. Since there are no blood vessels in the cornea of the eye, after wearing contact lenses, the eye is in a relative lack of oxygen, long time wearing, can lead to corneal hypoxia damage, and even cause inflammatory reactions. And when eye discomfort occurs during the wearing process, contact lenses should be taken off in time. If eye congestion has occurred, it is recommended to seek medical attention. After wearing contact lenses, you should avoid rubbing your eyes hard, which can lead to contact lens folds or turn with your eyes, or even turn to the back of your eyes. During the fitting process, you can avoid dryness and discomfort by blinking frequently to moisten the eye surface and resting your eyes regularly to relieve eye fatigue. Pay attention to hand hygiene when wearing contact lenses and wash your hands strictly before wearing or removing them to avoid bacterial contamination of contact lenses and eyes, which can cause conjunctivitis, keratitis and other diseases. If you need to wear makeup at the same time, you should wear contact lenses first and then makeup; when removing makeup, you should also take off your glasses first and then remove your makeup to avoid contaminating your contact lenses. In addition, contact lenses need to pay attention to the production date and use date, soak contact lenses need more than 4 hours to achieve the sterilization effect, regular cleaning once a week. If not used for a long time, they should be cleaned when worn again and kept for a maximum of 30 days. When the corresponding time is exceeded, it is recommended to replace the contact lenses with new ones.