The eyes are the windows to the soul and the windows through which people observe the world. 70% of the information people obtain about the outside world is “seen” through the eyes. This shows how important our eyes are to us. During summer vacation, many parents of students with myopic eyes go to the hospital for treatment in order to give their children a bright and clear world. In China, a country with a high prevalence of myopia, over the past two decades, millions of myopic patients have successfully removed their glasses and returned to a clear world through excimer laser treatment every year, and myopia is no longer an obstacle to joining the military or taking civil service exams. Technology development is endless, after the excimer laser cornea surgery, in recent years there is a more advanced, more accurate, safer “femtosecond laser technology”, which allows myopia correction surgery into a new milestone, into the “no knife” era. The company has been engaged in laser myopia surgery for more than a decade, and has been a leader in myopia laser surgery in China since the 1990s, with tens of thousands of surgeries under her belt. She introduced, in the course of the development of myopia laser surgery, the surgical equipment is constantly updated and improved, so the surgical method is also constantly improved and mature, from “knife” to “knife free”, from “laser From “laser” to “all-laser”, from “invasive” to “minimally invasive”. In recent years, the femtosecond laser has brought myopia surgery into the blade-free, minimally invasive era. The femtosecond laser is the shortest pulse available to mankind under experimental conditions, with precise targeting and focusing characteristics, and can perform microfine work in an ultra-fine space area much smaller than the diameter of a hair. Today, it is used as an ultra-precise surgical “scalpel” in myopia correction surgery. Unlike the excimer laser, the excimer laser only corrects the refractive error and does not create a flap, but requires a microkeratome or femtosecond laser if a flap is needed. Femtosecond lasers can be used not only to simply create the corneal flap needed for excimer laser lamellar surgery, but also for refractive correction. Currently, most femtosecond lasers can only be used for flap making, but only the Zeiss “full femtosecond” laser can combine flap making and laser cutting into one. Femtosecond laser makes a more perfect flap Traditional excimer laser in situ keratomileusis (LASIK for short) uses a mechanical lamellar knife to create a corneal flap, which is then cut with an excimer laser to correct myopia. Femtosecond laser flap making is the application of femtosecond laser system instead of mechanical lamellar knife to create corneal flap, under the precise control of computer program to complete the cutting of any depth and shape of the cornea, femtosecond laser can not only create more uniform, more accurate, more perfect ultra-thin corneal flap, but also according to the surgeon’s requirements to pre-set the thickness of the flap, the size, the position of the corneal tip and the angle of the edge incision. The effect of personalized cutting can be achieved according to different patients’ conditions. In the traditional laminar knife surgery, if the negative pressure ring loosens during the blade rotation, the corneal flap will fail completely and the surgery can only be done three months later, which brings great psychological pressure to the patient and the surgeon. In the case of a similar accident with the femtosecond laser, the surgeon can simply put the negative pressure ring back on and immediately replenish the laser without interrupting the surgery. Because the femtosecond laser only produces some water and bubbles to push away the corneal tissue when creating the flap, there is no damage to the tissue, and multiple surgeries can be performed on the same affected area, greatly improving safety. Advantage 2: Embedded corneal flap, more accurate reset. The lamellar knife is a horizontal cut, and the surface of the eye is a sphere, so the flap profile is “cup and lid” type, and the adhesion with the eye matrix is not good enough; while the corneal flap made by femtosecond laser is embedded with the eye matrix in the “underground well lid” type. It is easy to reposition the flap and the stroma of the eye in a “subterranean manhole cover” type of embedded occlusion, so there is no misalignment and no complications such as flap fragmentation or button flap. The laser light source also avoids the residual metal debris that may be caused by the use of laminate knives. Advantage 3: Avoid medical-derived infections. Many small laser eye institutions in the implementation of LASIK surgery, in order to reduce the cost of surgery, did not strictly implement the principle of “one person, one blade”, the disposable surgical blade repeatedly used, greatly increasing the cross-infection and other medical risks, femtosecond laser makes the first time in human corneal surgery away from the lamellar knife, the surgical process occurred Cross-infection during surgery is now history. Advantage 4: Better post-operative visual quality. Femtosecond laser can precisely open the molecular chain of eye tissues to produce a more uniform and perfect flap, effectively avoiding the medical aberrations that may occur with laminate flap making, avoiding glare and blurring in foggy days, rainy days and night driving conditions, allowing myopic patients to achieve perfect visual quality. Advantage 5: “All-laser” surgery, 100 times more accurate The femtosecond laser can control the accuracy of corneal flap making within 10-15 microns, which is more than 100 times more accurate than the laminate knife, and is safer for any patient. Advantage 6: It is not affected by corneal curvature, and the correction range is wider. In the past, the thickness of the cornea was affected by the fact that nearly 10% of the patients were basically unable to undergo traditional laser surgery such as LASIK because their myopia was too deep and their cornea too thin. The laser surgery is not affected by the curvature of the cornea, which is a great blessing for myopic patients with thin corneas and large corneal curvature variation. The “full femtosecond” laser does not require a flap, the surgery is more minimally invasive Director Zhi introduced, although the production of corneal flap and excimer laser ablation refractive index of the classic surgical approach has been very mature, but the existence of the corneal flap is always the drawback of this surgical approach, it destroys the integrity of the physiological structure of the cornea, weakening the biomechanics of the cornea, and The flap is easily displaced after ocular trauma. “This procedure is called microincision corneal stromal lenticule excision, or SMILE, or “smile surgery,” in which the femtosecond laser performs two separate scans of the corneal lamina at different depths to complete a complete The surgeon uses special instruments to separate and remove the femtosecond-shaped lenticular tissue along the microincision. It is a minimally invasive procedure that does not involve corneal flap making and flap lifting, avoiding the risk of corneal flap complications, minimizing damage to the physiological structure of the cornea and obtaining better visual results. Since the integrity of the corneal nerve is preserved, the occurrence of postoperative dry eye is also avoided. It is especially suitable for people who are vulnerable to trauma, such as the military and athletes. ”Full Femtosecond” laser surgery is one of the most advanced modes of keratoconus surgery in the world, which brings the safety and precision of myopia correction to a new level. Due to the high development cost and difficult to break through the technical bottleneck, only the German Zeiss “full femtosecond” laser can be used in the “full femtosecond” myopia correction surgery. According to Director Zhi, since the introduction of this device, Xuzhou Central Hospital has attracted a large number of myopic patients to receive surgery, and the good treatment effect is favored by patients.