(1) Contraindications to keratoplasty lens fitting (1) eye contraindications: including various causes of dry eye; chronic dacryocystitis; incomplete eyelid closure; (2) systemic contraindications: including acute and chronic paranasal sinusitis; severe diabetes; using corticosteroids, atropine and other drugs that have an impact on correction; (3) refractive contraindications: cis-regular astigmatism greater than 300 degrees, retro-regular astigmatism greater than 150 degrees (4) individual condition contraindications: age less than 10 years; poor personal hygiene and non-compliance with treatment rules; (5) other contraindications: those who have undergone keratoconus surgery; corneal trauma, 12LHg > IOP > 21LHg; central corneal thickness ≤ 0.4L. 2, pay attention to the cleaning and care of keratoconus lenses, improve eye care awareness Care solution: Chemical solution used for cleaning, disinfection, wetting and protein precipitation of lenses, consisting of disinfectant, wetting solution, surface cleaner, protein removal components, etc. Care tools: special cases, mirrors, wands, fingers, and disinfection utensils used in the care process. During the use of keratoconus lenses, they can be contaminated by proteins, grease and dust in the tear fluid, which can cause adverse eye irritation, affect the optical properties of the lenses and reduce the corrective effect of the lenses. Therefore, the cleanliness of the lenses is directly related to the efficacy and longevity of the lenses and whether they cause damage to the eyes. Patients and their families must pay great attention to the hygiene of wearing lenses, take care of the lenses strictly according to the regulations, raise the awareness of self-protection, develop good personal hygiene habits, try to choose a care solution with good cleaning effect and protein removal, and use a special case for rigid lenses. In general, when it comes to care, it is often simply thought of as disinfection, which is not always the case. Disinfection plays a pivotal role in the whole care operation, because it is closely related to the safety of wearing lenses. 3. Washing and rinsing of keratoconus lenses The lenses need to be washed and rinsed before wearing and after removal, especially before preserving them after removal. First of all, clean your hands, take out the lenses, place them in the palm of your hand with the concave side of the lenses facing upwards, bend your palm slightly, put 3-5 drops of full-function care solution (note that the bottle should be completely upside down each time you use the care solution and then squeeze it to prevent the solution from being infected by the bottle), rub the lenses with the index or middle finger of your dominant hand for about 20 times, then hold the lenses with the thumb, index and middle finger of your dominant hand and wash them with rinse the inner and outer surfaces of the lenses with cool boiling water, (cleaning process, often can inadvertently contact the lenses off, in order to prevent flushing away the lenses, be sure to block the drain,) until rinsed clean, can be observed against the light, if the lenses are smooth and transparent, that the lenses have been cleaned, such as not clean, should continue to clean. When there are more contaminants attached to the lens, a strong cleaning solution can be used to clean the lens, and can be used to repair the lens abrasive to match the detergent, but this treatment can only be done in the fitting hospital or manufacturer, by professional technicians to ensure that the curvature of the lens, refractive error does not change. 4, keratomileusis lens preservation keratomileusis lens must be placed in a special preservation box for rigid contact lenses to prevent scratching the lens. The care solution in the box should be able to submerge the lens, the care solution mainly contains surfactants and antiseptics, with the function of cleaning, disinfection and preservation of the lens. The care solution in the case should be changed daily and should not be reused. After taking out the lenses, rinse off the preserving solution thoroughly with cool boiling water. Each time the lenses are immersed for not less than 6 hours. If the lenses are not worn for a long time, the solution in the case should be changed at least once a week. The case for preservation should also be cleaned daily and the case should be disinfected once a week. 5, the service life of the keratoplasty lens lens life requirements to wear no more than two years, some people may not want to throw away, do not follow medical advice will use three years, or even longer, the glasses will also be aging deformation, wear to the eyes on the eyes have adverse effects, but also cause unclear vision, double vision. 6, care solution use common sense Most of the contact lens care solution sold on the market are soft contact lens special, can not be used to clean, preserve the lens of keratoconus. The special care solution for keratoconus lenses is a multifunctional care solution that includes protein removal function. The biggest advantage of the multi-functional care solution is that the ingredients needed for each step are integrated into one, and only one bottle of the care solution is needed to complete the above multiple steps for the purpose of cleaning, moisturizing, disinfecting, and removing protein precipitation. Also, by combining the links, the variety of care is reduced and the chance of contamination of the lenses is reduced. 7. Approximately how long should I wear my keratoconus lenses at night? For low to moderate myopia, about 7-9 hours per day at night. High myopia, more than 7 or 8 degrees, or even more than 1,000 degrees, such children are not recommended to wear them at night, we let them wear them during the day, so that they can maintain a constant good vision effect throughout the day, but also a certain amount of corneal shaping, and from a safety point of view, the degree of high, if worn during the day, some other adverse reflections appear less. 8.Do I need to be reviewed regularly when wearing keratoplasty lenses? The follow-up review should be done at least 7 times within the first 6 months and regularly after 6 months, including: refraction, visual acuity, mobility, central positioning, comfort, fluorescein staining, corneal topography and intraocular pressure. Reminder: If your child feels uncomfortable, don’t wear it anymore and go to a regular hospital for examination as soon as possible. We are very strict in monitoring children wearing keratoplasty lenses.