The eyes are the windows to the soul, and about 80% of the information a person obtains about the outside world is “seen” through the eyes. It goes without saying that the eyes are important to us in today’s highly informed civilization. And China is a country with a large number of myopic eyes. Myopia is not only a refractive problem that affects education and career choice, but also life, work and sports. Therefore, it is the common wish of myopic patients to remove their glasses and restore clear and free vision. For a long time, ophthalmologists and optometrists have strived to find positive and effective ways to correct myopia and stop its progression. In the past hundred years, unremitting efforts and exploration have been made in the surgical correction of myopia. However, for the time being, myopia cannot be cured. Myopia surgery is the use of laser energy to change the curvature of the cornea and reshape the curvature of the cornea so as to correct myopia, hyperopia and astigmatism. In fact, it is the use of high-tech means in the cornea of the human eye to carve a contact lens that will never be removed. It is not fundamentally a treatment for myopia. 1. Are all patients suitable for surgery excimer laser surgery indications? Not all myopic patients are suitable for surgery. Generally, only those who meet the following conditions can be considered for excimer laser surgery: 1) age 18 or older, healthy psychological state, and the desire to remove glasses; 2) relatively stable myopia in the past 2 years, with an annual deepening of no more than 50 degrees; 3) no other eye diseases; 4) myopia correction range of 100 degrees to 1500 degrees; 5) astigmatism can be corrected at the same time (6) no collagen disease, diabetes and immune diseases and other systemic diseases. If you wear contact lenses, soft lenses should be removed for 2 weeks and hard lenses should be removed for more than 4 weeks (you can switch to frame glasses before doing the pre-surgery examination); after the doctor’s examination, all indicators of the eyes meet the requirements of surgery. Myopia surgery is an elective surgery, and safety is the crucial first factor to consider. In particular, the state and thickness of the cornea and the degree of myopia are by no means sufficient for any degree to withstand surgery. Safety first, results second. To consider the effect under the premise of safety. 2.What is the difference between femtosecond laser and mechanical keratome? Femtosecond laser can focus to a space area smaller than the diameter of a hair and is used for micro-fine processing. Because of the characteristics of the femtosecond laser, medical experts have used him as a super-tight surgical knife for vision correction surgery. Now, the femtosecond laser is used to create corneal flaps in LASIK myopia surgery, which can precisely cut the cornea to obtain the desired thickness of the flap. Theoretically, femtosecond laser has an advantage over mechanical keratomes, but according to a May 2010 article in the American Journal of Ophthalmology entitled Comparison of postoperative corneal aberration and visual acuity between femtosecond laser and mechanical keratomes, the prognosis of patients using femtosecond laser is consistent with that of mechanical keratomes, and the advantages of femtosecond laser are yet to be further developed. 3. What is personalized surgery? Personalized surgery is broadly defined as individualized surgical design for each person’s individual situation and differences. In a narrow sense, individualized cutting laser surgery refers to individualized cutting techniques guided by corneal topography or wavefront aberration. The latest Q-adjusted individualized laser cutting technique, Q-guided technique, takes into account the physiological aspheric factor of the cornea and the individual differences of each person’s cornea to better solve the problems of post-operative aberration and glare, and can also save cornea for some patients with relatively thin corneas. For the eye, individualized cutting is a “made-to-measure” technique similar to three-dimensional tailoring. This is the latest trend in laser surgery.