1.If you have a cold, fever, diarrhea, eye discomfort (such as eye pain, itching, photophobia, tearing, etc.), increased secretions, stop wearing immediately and contact your doctor in time. 2, the lens itself has a certain degree of brittleness, easy to break, cleaning should be careful, the action of light kneading, force uniform to avoid debris, pay attention to avoid the lens scratches and loss of pieces. 3.When cleaning lenses in winter, you should use cold boiled water with a temperature of (20-35℃), so as not to increase the brittleness of the lenses by too low a water temperature and lead to fragmentation, and too high a water temperature will deform and damage the lenses. 4, cleaning and soaking lens care solution should be special hard lens care solution (care solution is valid for three months after opening), do not use soft lens care solution instead, and care solution absolutely can not enter the eyes. First, wear the mirror before preparation: 1, cut off the long nails. 2, in the sink put only hand basin to prevent the lens is washed away by the water. 3, with soap (yellow transparent laundry soap) wash your hands twice, especially the fingers in contact with the lens should be repeatedly rinsed. 4, put a clean white towel in front of the mirror on the operating table, so as not to scratch the lens off. Second, wear the mirror: 1, will be removed from the lens box with cool water rinse clean, concave upward on the right index finger fingertips. 2, with the left finger to pull open the upper and lower eyelids, finger position should be placed in the middle of the inner and outer canthus and close to the root of the eyelashes, to ensure that the cornea is completely exposed. 3. With both eyes looking into the mirror in front of you, align the lens with the cornea with the index finger of your right hand and gently place the lens in the center of the cornea. Confirm that the lens has been worn in the center of the cornea and then slowly release the finger pulling the eyelid, you can close your eyes to adapt to about 3 seconds. If the lens is worn at the bulbar conjunctiva, use the suction stick to suck out the lens in time, rinse it out and wear the lens again; wear the lens in the other eye according to the above operation; 4, pour out the care solution in the lens box after each wear and use hot water to scald and disinfect it, and put the lens box on a napkin to air-dry it for the next use. 5, Keratoplasty lenses should be worn before going to bed, and ensure that the daily wearing time is 8 to 10 hours. Remove lenses: 1. Wash your hands fully with transparent soap. 2. 2.Pour a little care solution into the lens box first to prepare for putting the lenses. 3.Before removing the lenses, point the soothing liquid into both eyes and blink, and then remove the lenses after the lenses slide on the cornea. 4. Pull the eyelid open to expose the cornea completely, point the suction stick to the outside or slightly below the lens, and then suck out the lens after contacting the lens completely. Remember not to pull the lens vertically at the center of the cornea to avoid damage to the cornea. 5. Clean the removed lenses with care solution or cleaning solution, then rinse them with cold boiled water and put them into the case with the concave side up, then add care solution to completely submerge the whole lenses and cover the case tightly. Every day, the lenses should be immersed for 6 to 8 hours. 6, after using the suck stick can be rinsed with cool boiled water, wipe dry, suck stick box to keep dry, so as not to breed bacteria.