Although keratoplasty lenses are good, there are also various common problems that occur. Don’t be nervous when wearing keratoplasty lenses with abnormalities, but go to the hospital in time, according to the doctor’s recommendations for symptomatic treatment. Remember to wear them according to the regulations and pay attention to local cleaning and care. The following is a brief introduction to the most common problems, I hope to help parents. 1, can I wear glasses when I have a cold and fever? Generally speaking, a cold and fever will lead to a decrease in body resistance, the local immune level of the eye surface is also reduced at this time, it is best not to wear glasses, wait until the body heals and then wear glasses. 2.What about corneal staining? Mostly due to inappropriate cleaning, incomplete cleaning of the central area of the posterior surface, inadequate protein removal, allergic and toxic reactions to the care solution, or the lens is too flat, mechanical friction corneal irritation (this is mostly seen in high myopia when replacing the second or third pair of lenses). The first thing to do is to clean the lenses carefully, if they cannot be removed, go to the hospital to have the lenses dissected; you must use a care solution that has the effect of removing proteins; you can adjust the lenses if the staining persists; you can consider changing the brand of the care solution if you really cannot find the cause. 3. What should I do if the treatment is not effective? For example, -3.00D myopia, after wearing the lens for 1 month, only reduce -1.00D, myopia correction effect is not obvious. In this case, if the fitting is improper, it needs to be corrected again. More cases may be related to the elasticity of the individual cornea, eye pressure, tear quality, etc., which are normal individual differences. In such cases, first go to the hospital for examination to determine whether the lenses need to be adjusted, if the wear is good and the cornea has no adverse reaction you can ask the physician to properly flatten the base arc of the lenses, observe for 2-3 weeks and gradually adjust, the corneal K value is often too flat when the effect is not good. 4, vision correction is very good, but the maintenance time is short how to do? The common reason may be the poor positioning of the center of the lens, the lens is too tight. In addition, the larger the myopia, the shorter the maintenance time. In general, the less the amount of myopia reduction, the longer the maintenance time. For myopia greater than -6.00D, the treatment effect is unlikely to last 1 day, so consider changing to daytime wear or alternating daytime wear at night. There is also a situation where the lens has reached the end of its life and needs to be replaced, its life is generally 1.5-2 years, individual 1 year or so also need to be replaced. 5.What is the reason for having good vision during the day, but always having a false image at night? There is a gradual recovery process after keratoplasty. It is more common to observe a false image when the surroundings are dark, some can gradually fade away, while others will persist, mainly related to the size of the pupil diameter. At night, the pupil diameter becomes larger than the central corneal optical treatment area, which can lead to a false image even if the lens is well worn. Another cause is lens misalignment. Generally speaking, with the wearing time will gradually reduce, for the deviation may have to re-evaluate the lens wearing situation. 6.Is it normal to have red eyes after wearing the lenses? Some children may wake up the next day with red eyes, or dry eyes, seeing things vaguely. If it subsides quickly and there is no discomfort reaction, the main consideration may be the cause of dry eyes. Do not be nervous about this situation, continue to wear glasses, you can properly supplement artificial tears, more can gradually improve. If the eyes continue to be red, and there is a lot of discharge, eye pain, tearing and other uncomfortable symptoms, you should promptly remove the lenses and go to the hospital, this situation may be caused by eye inflammation, bacterial infection, or lens misalignment, discomfort. Especially if you have been wearing the lenses for a long time without any abnormality, but suddenly this situation appears, you should pay enough attention to it and consult a doctor in time.