1, must be hand-rubbed lenses, such as the general dirty clothes without first scrubbing, directly into the washing machine, is unable to remove the stubborn reason, contact lenses must be hand-rubbed for more than 30 seconds, in order to achieve the cleaning effect. According to the study, hand scrubbing is more effective than any machine in removing impurities and sediments from lenses. In addition, tap water or boiling water has no cleaning and disinfection effect and should not be used to clean contact lenses. 2, every 1 to 2 years to replace the new contact lenses The perfect cleaning and maintenance method, there will still be a little microbial residue on the lenses. Even if not often used, the lens material after 1 to 2 years, naturally become old, at this time should be discarded for new, so as not to hurt the eyes. 3, the lens can not be placed in physiological salt water preservation physiological salt water is not sterilized, used to preserve the lens, easy to breed bacteria, causing eye infection. 4, different brands of contact lenses, can not be used together because the composition of the various brands of drops are different, can not be mixed or replaced at will, in order to avoid chemical effects, harming the lenses. In fact, so far, ophthalmologists are of the opinion that there is no contact lens solution that is completely free of side effects. The heating disinfection method does not cause the side effect of chemical residues, but the heating method tends to reduce the life of the lenses; multifunctional drops are simple and convenient, and the peroxide system has the strongest germicidal power, but the cleaning function of both is poor. Although the traditional method of cleaning, rinsing and soaking is troublesome, it is currently considered a safer cleaning and maintenance procedure by physicians. 5.Fixed weekly protein removal Protein adsorbed on the lens will form a thick wall over time, easily scratching the cornea. Enzyme tablets can break down the protein structure and maintain the cleanliness of the lens surface by removing protein. The enzyme is included in the ingredients to have the effect of protein removal. He believes that so far, there is still no antiseptic solution on the market that can completely replace the weekly protein removal work. In addition, the longer you soak the enzyme tablets, the better the results. It is best not to soak for more than 12 hours because the decomposed proteins will re-infiltrate into the lens and be firmly adsorbed, which will be more difficult to clean. 6, there is also a deadline for the use of the medicine water after the unsealing of the medicine water, it is best to use up within 4 months or discard for a new one, so as to avoid the deterioration of the medicine water. Physiological saline after unpacking, because no preservatives, the use of the period is best not to exceed 1 month. 7, contact lenses before wearing, first flush saline because contact drops are mostly chemical agents, easy to wear directly on the eyes cause irritation, it is best to use saline to flush clean before wearing. 8, contact lenses can not be long-term immersion in the drug water long time immersion, the drug water lost disinfection ability, restore the ordinary water, but become a breeding ground for bacteria. Usually 2 days to replace a new soaking solution, but some solutions can be kept airtight for a week, depending on the composition of the solution itself. Be sure to disinfect and clean again before wearing. 9, once every six months to send the original factory maintenance Usually the optician is to put all the glasses together to clean, easy to have the risk of infection. As long as the individual will do a good job of daily cleaning and maintenance, weekly fixed to protein, only half a year to send back to the original contact lens company to do maintenance once. 10, double oxygen disinfection system, must be neutralized before use double oxygen disinfection system because of the use of 3% hydrogen peroxide (the same as the general trauma with hydrogen peroxide), must be used after the platinum ring or neutralization tablets will not cause eye burns. For example, the neutralizing effect of the platinum ring decreases with each use, so it is recommended that the platinum ring be replaced at the same time as each new solution. In addition, the high water content of disposable contact lenses, should not be used peroxide disinfection system, the lens will be deformed. 11, red eyes, it is best to remove contact lenses as long as the eyes are red, photophobic, tearing and other uncomfortable situations, it is best to immediately remove contact lenses, and take them with you to the doctor to check to see where the problem is. The cornea of contact lens users is usually more fragile, and most of them only come to the doctor when their vision is blurred, by which time their vision is already quite damaged. 12. Change your contact lens case regularly Rinse and clean your case and the basket where you put your lenses every day. In addition, clean and dry them weekly with hot water, neutral detergent, and change the case and the lens basket once every six months or so. It is best not to put them in the bathroom because they are prone to mold and mildew due to humidity.