Keratoplasty is a medical technology that requires qualified physicians, qualified lenses (medical devices) and qualified users (patients) to be successful, i.e., safe and effective. The China Food and Drug Administration and the U.S. FDA have approved the clinical use of keratoplasty lenses, and these approvals were made after rigorous clinical trials, proving that this product is safe for use by qualified users under the guidance of qualified physicians. It is important to emphasize that a qualified product alone is not a complete guarantee of safety. For example, although the quality of a drug is not in question, a physician who prescribes the wrong dosage of the drug or a patient who overdoses may still have adverse consequences. The safety of keratoplasty requires that the physician, the lens and the user are all qualified, i.e. if the physician chooses the appropriate user, the dispenser chooses the appropriate lens, the manufacturer processes the appropriate lens, and the user uses and cares for the lens according to the physician’s instructions, then keratoplasty is safe and can be used without fear. Keratoplasty was born in the United States in the 1950s and 1960s, and has been developed to a relatively perfect level in the United States. In China, the rapid popularization of keratoplasty has a relatively short history, so many people do not understand the effectiveness and safety of this physical myopia treatment. In order to examine the effectiveness of Keratoplasty, American experts have spent several years collecting information from more than 1,500 experts around the world who have conducted research on Keratoplasty. In addition, the experts also conducted a clinical practice survey of medical institutions in 11 regions across the United States. The results of the survey showed that of the 205 young children and adolescents aged 12 and older, 67.4% of the patients had their vision improved to 1.0 after nine months of continuous use of keratoplasty lenses; 94.3% of the patients had their vision improved to 0.5 or higher. Moreover, 78.4% of the patients did not experience any adverse effects after using keratoplasty lenses. Regarding the other 21.6% of patients who had adverse reactions after using keratoplasty, the experts also conducted field visits and detailed analyses. The experts are of the view that the examination results given by the medical institutions show that these patients were more or less irregular in the process of wearing, removing and caring for keratoplasty lenses, and some of them even wore keratoplasty lenses when they suffered from colds or other ophthalmological illnesses. Although the U.S. FDA, which is known as the world’s strictest certification system, has certified the safety of keratoplasty lenses, the standardized operation and careful care of the wearers are still indispensable to maintain this safety. The above is the description of “Keratoplasty safety”, if there are other questions, you can consult me online.