Summer vacation into nearly half, parents in addition to myopic children to replace the frame glasses, there are many people to children choose a direct contact with the cornea and the plastic lens. A mother of a child undergoing an eye test told reporters: “When my child was in the third grade, he wore glasses for only a year, and his myopia jumped from 200 degrees when he was first fitted with glasses to more than 400 degrees. Since August last year in a hospital with keratomileusis, myopia has not grown, and I can basically see clearly without glasses during the day. Now during the summer vacation, worried about the child watching TV during the holidays glasses will grow again, so I brought the child to the optometry examination, and was surprised to find that the child’s prescription did not grow.” What exactly are keratoplasty lenses? The so-called keratoplasty lens is a special high oxygen permeable rigid keratoplasty lens designed according to the myopic patient’s corneal geometry and refractive error, using the night wearing correction method, the day after taking the lens to get a good naked eye vision. In general, myopia up to 600 degrees can be improved or controlled in about a week. These keratoplasty lenses are effective in controlling myopia in adolescents, especially those under the age of 18 who are developing myopia too rapidly. With its high oxygen permeability material, there is no damage to the cornea, making it an extremely safe product. The keratoplasty lens originated in the United States and has been used in 34 countries worldwide after 50 years of development. It is a keratoplasty lens designed with a special inverse geometry, whose inner surface is composed of several arc segments. The lens is unevenly distributed with the tear layer, and the resulting hydrodynamic effect changes the geometry of the cornea, and when worn on the front of the cornea during sleep, it gradually flattens the curvature of the cornea and shortens the eye axis, thus effectively stopping the development of myopia, and is known as “the technology that controls and corrects myopia while sleeping”. Of course, rigid gas permeable corneas are not suitable for everyone. First of all, contact lenses should not be worn during colds, fevers, eye inflammation and eye diseases such as glaucoma. Secondly, it does not treat the root cause of myopia and can also cause vision to rebound after stopping wear. However, because keratoplasty does not change the structure of the cornea, it offers a chance for the future treatment of myopia in teenagers and is an effective way to stop the growth of myopia in teenagers. In addition, there are age restrictions, President Lu Bin also said that the age range of 8-18 years old children are most suitable for wearing keratoplasty lenses, because this age group of children study under great pressure, high intensity of eye use, myopia is developing faster, more opportunities to participate in various sports, but also prone to some accidental injuries, including those caused by frame glasses. The advantage of keratoconus is that it slows down the growth of myopia and the removal of the lenses during the day. Children over the age of 8 are more capable of understanding, communicating and taking care of themselves, and since they are younger and have lower prescriptions, the earlier they wear them, the more effective they are. Therefore, 8-18 years old is the best age to wear keratomileusis. Many parents tend to think there is no difference between wearing these glasses and having contact lenses. In fact, it is very different. President Lu said, strictly speaking, keratoplasty is actually a medical device, with the need to go through a thorough examination before wearing. In Yinzhou Eye Hospital corneal shaping lens fitting need to go through 18 precision checks, including visual acuity, corneal topography, computerized optometry, non-contact intraocular pressure measurement, the anterior segment panoramic instrument, comprehensive computerized optometry, fundus examination and so on. President Lu said that the wearing of keratoplasty lenses takes nearly 3 hours from the comprehensive diagnosis and free trial process. One of the mandatory tests is the dilated pupil. This is to rule out pseudomyopia. Because of pseudomyopia after treatment, the child can completely eliminate the need to wear glasses, while non-medical institutions only a few optometry procedures, is very unscientific and unsafe.