”Lend me a pair of wise eyes, let me see the chaos clearly and clearly and truly ……” Almost since the early 1990s when Na Ying’s song became popular, for hundreds of millions of nearsighted people in China, “lending me a pair of wise eyes” is no longer a dream. “A magical procedure called excimer laser keratomileusis, or LASIK, allows them to see the world clearly and authentically. For 20 years, more and more people have chosen this option to correct their myopia and return to a clear world. However, more than a year ago, Taiwanese doctor Rui-Fang Tsai’s “closed knife” comment brought the topic of laser myopia surgery’s safety to the forefront, and despite follow-up reports clarifying the facts, and a joint statement from the Chinese Medical Association and the Chinese Medical Association objectively and fairly evaluating the procedure, many people still have doubts about the safety of laser myopia surgery. The safety of laser myopia surgery is still in doubt. With the summer holidays just around the corner, there will be many more people ready to choose this surgery to correct their myopia. So, is laser myopia surgery safe? Is excimer laser surgery safe? Myopia correction surgery has a history of 50 years, since the 1990s there has been significant progress in surgery, namely the use of high-tech equipment to carry out the excimer laser refractive corneal surgery, 20 years in the world widely carried out, achieved significant therapeutic results, it is its good safety and stability by the myopic patients welcome, domestic each year there are millions of myopic patients choose this surgery and return to a clear This is a major breakthrough in the history of myopia treatment over the years. Of course, at the earliest stage of the development of excimer surgery, due to less understanding of the surgery and less perfect equipment, there were complications related to the surgery, including cone corneas, corneal flap-related complications, cutting off-center, etc. However, with the continuous upgrading of equipment and improvement of surgical methods, the above complications have rarely occurred, coupled with the introduction of a series of guidelines related to refractive surgery. In addition, a series of guidelines on refractive surgery have been issued, which have standardized the examination and procedure of surgery and ensured the safety of surgery. Recently, our ophthalmology department has built a new class 10,000 laminar flow operating room with the highest degree of purification, and introduced the latest generation of excimer laser equipment from Zeiss, which can apply the flying dot scanning system for corneal cutting, plus the iris and pupil positioning active tracking system, which can make the surgery more accurate. Does laser myopia surgery have any effect on the future? In clinical practice, we often hear patients ask questions such as these, but in fact, such concerns are unnecessary. The excimer laser only cuts a thin layer between the layers of the cornea and does not damage the intraocular structures in any way. Moreover, the effect of the excimer laser in vaporizing the tissue cells is transient and superficial and does not produce any adverse effects with age. Unlike what some people say, the effect only lasts for 10 years, and unlike what some people worry about, the procedure will lead to cataracts and other eye diseases in old age, as evidenced by the 20-year history of laser surgery. However, it should be reminded that myopic eyes, especially highly myopic eyes, are more prone to pathological changes than normal eyes, and although laser surgery does not promote the occurrence of pathology, it does not prevent it. Therefore, once your vision has improved, it is important to check your eyes regularly, especially the condition of the fundus, so that complications of myopia can be detected and treated in time. Why is femtosecond laser surgery more perfect and safer? Femtosecond laser is able to create a more uniform, precise and perfect flap, and the chance of complications from flap creation is reduced by hundreds of times compared to the chance of complications from mechanical knife (microkeratome). The procedure does not require a scalpel, resulting in better night vision and better visual quality, and is safer and more personalized. In particular, the Zeiss “Full Femtosecond” laser takes myopia correction to a new level of safety and precision. The “Full Femtosecond” laser surgery is a micro-incision corneal stromal lenticule excision, which is a complete myopia correction lenticule cut by a femtosecond laser that scans the corneal lamina at two different depths, and the surgeon uses special instruments to separate and remove the femtosecond-shaped lenticule tissue along the micro-incision. It is a minimally invasive procedure that does not involve the process of flap making and flap lifting, avoiding the risk of corneal flap complications, minimizing the damage to the corneal physiology and obtaining better visual results. Therefore, the Zeiss Femtosecond laser system really makes myopia surgery enter the “blade-free” era and minimally invasive era, ensuring a safer and more reliable surgery. How is the pre-operative examination to ensure the safety of the surgery? Laser myopia surgery is a highly selective procedure, and a small number of people are not suitable for surgery. Only through a thorough preoperative examination can contraindications to surgery be ruled out and reliable parameters be provided for the surgical design. The current preoperative examination required for excimer laser includes, corneal topography, optometry, corneal thickness, intraocular pressure, fundus and more than 10 other items. Our newly introduced most advanced preoptic nodal analysis system more reliably excludes cone corneas and can make the surgery in suitable people, which will greatly reduce the risk and complications after surgery. In addition, the wavefront aberration examination is like “tailor-made” for each individual, which makes the treatment more “specific” and leads to better post-operative vision, as well as improving post-operative visual sensitivity, reducing the incidence of glare and halos, and improving night vision. In other words, the preoperative examination determines the safety of the surgery. What kind of hospital and surgeon should I choose for the surgery? There are many hospitals that can perform myopia surgery, but choosing a well-managed medical institution and an experienced refractive surgeon is crucial to surgical safety. First, choose a regular, public hospital; second, know the equipment and technical level of the hospital; third, choose a hospital whose operating room has reached the international standard of laminar flow surgery, and fourth, choose a surgeon who is experienced in surgery. In addition to the performance of the machine, the effect of the surgery depends mainly on the technical level of the doctor. Because each patient’s situation is different, the surgical process is highly variable and there is a possibility of certain accidents, which must be solved quickly by relying on the doctor’s skills after they occur. Therefore, it is safer and more reliable to choose a medical institution that has been operating for a long time, has a large number of surgical cases, a surgeon with rich clinical experience and a good reputation, a large number of patients and standardized management in all aspects. What can patients do after surgery to make it safer? Most of the complications after surgery can be improved or cured by medication adjustment, which requires timely follow-up and medication according to medical prescription. In addition, most patients with myopia, especially high myopia, have fundus lesions, which may worsen with age. Although patients have better vision after myopia surgery, it does not mean that these fundus changes do not exist anymore, so it is recommended that myopic patients need to review their fundus every 2 years or so after surgery to achieve early detection and early treatment to avoid complications that seriously affect vision.