What is an excimer laser? Is there any damage to the human body? Excimer laser is a mixture of fluorine and argon gas that is excited to produce an ultraviolet light beam invisible to the human eye. It is a cold laser that can precisely ablate the part of the cornea that is expected to be removed without damaging the surrounding tissues and other tissues and organs. Therefore, excimer laser surgery is very safe. Is excimer laser surgery available to all myopic patients? No, it is not. The procedure requires a strict pre-operative examination (about 16 items). Only people who pass the examination can undergo the surgery. Who can have the surgery and who cannot? Suitable people: people who are at least 18 years old (except for special cases); people who have had stable myopia for the past two years, with an annual increase of no more than 100 degrees; people who have less than 1200 degrees of myopia, less than 600 degrees of astigmatism, and less than 600 degrees of hyperopia (also depends on the thickness of the individual’s cornea); people who do not have active inflammation in the eye, etc. Not suitable for people: unstable degree in the last year, deepening more than 100 degrees per year, corneal thinning; with eye diseases such as acute infectious inflammation, cone cornea, glaucoma, cataract, fundus lesions, etc.; in addition, people with diabetes, collagen diseases are also not suitable for excimer surgery. Are the results of the surgery permanent? Excimer laser refractive surgery is performed on the corneal stroma. The laser accurately hits the molecular bonds of the cells, vaporizing the corneal tissue and changing the curvature of the cornea. Because the corneal stroma is a non-regenerative tissue, the curvature of the cornea will not change again after treatment, thus ensuring that vision will not generally rebound after surgery. The post-operative eye, like the normal eye, should also develop good eye habits and avoid eye strain. Are there any risks associated with this procedure and will there be any after-effects in a few years? The wavelength of the excimer laser is very short, 193 nm, and cannot penetrate into the eye, so it is very safe. It has been proven in theory and practice over the years that the flattened front surface of the eye does not become convex again with time, so there are usually no after-effects after surgery. Of course any surgery has some risk, although the incidence of this surgery risk is extremely low. Therefore, choosing a professional hospital and an experienced surgeon can control the risk of this surgery to a minimum and guarantee the safety of the surgery. I see that many hospitals have the slogan “remove glasses instantly”, is it really that fast? How long does the procedure take? Do I need to be hospitalized? The surgery takes about ten minutes for both eyes, and the actual laser treatment takes only a few tens of seconds. There is no need to be hospitalized after the procedure. Does the machine receiving the excimer laser affect the results of the surgery? Specialized equipment, hardware and other facilities can also affect the results of excimer laser surgery. The excimer laser has a history of more than 20 years since its birth, and the equipment used for excimer myopia correction has gone from the first generation to the current fourth generation level. The newer the device model, the more mature the technology and software, and the better the visual quality after surgery. For example, the latest excimer laser correction devices are now able to do individualized surgery, while earlier devices cannot do this latest surgery. I have heard that there is an individualized excimer laser myopia surgery, so what is individualized surgery? ”Individualized” surgery has evolved from the “standardized” surgery of the past. Simply put, “individualized” surgery is like “tailor-made” surgery. In the past, standardized surgery was like having your uniform made in advance by size, and all you could do was choose a uniform that was relatively suitable for your body. The “individualized” surgery is like finding a good tailor to “tailor” the individual in advance, so of course it fits better. How do I choose a hospital if I want to undergo excimer laser myopia surgery? The first thing to look at is the overall expertise of the hospital. Although excimer laser surgery is now a relatively mature refractive surgery, it involves all aspects of the eye, such as intraocular pressure, fundus, corneal thickness, etc., which are directly related to the outcome of the surgery. Therefore, when choosing a medical institution, you should choose a hospital with a high level of comprehensive ophthalmology treatment. The physicians of these hospitals have rich experience in the examination and diagnosis of various eye diseases and have a more accurate grasp of the indications and contraindications for myopia surgery, which can reduce the risk of surgery. Specialist hospitals, through the accumulation of a large number of clinical cases, have more advantages in terms of surgical experience and can quickly and accurately deal with various situations that arise during and after surgery. So how do you choose a doctor? The first thing to look at when choosing a surgeon for excimer laser myopia is the surgeon’s surgical experience. The same is true for excimer laser myopia surgery, but there is a big difference between those who have done it, will do it and do it well. The central cornea of the human eye is less than 1 mm, and the corneal flap is made with a high-speed advancement keratome on the transparent, delicate and so thin cornea, and fine cutting and sculpting is done with laser on the cornea, which requires a high level of psychological quality, professional ability and surgical experience of the surgeon. The lack of experienced specialists with only a high-tech device will undoubtedly increase the risk of surgery for patients. Secondly, you should choose a knowledgeable and experienced surgeon. Excimer laser myopia correction surgery is a very new technology and the corresponding technology is developing rapidly with the development of technology. If you are new to the procedure or if the doctor is not up to date with the latest knowledge and advances in the procedure, you will not be able to understand and operate the procedure well. Therefore, an experienced, knowledgeable and experienced surgeon is essential to the success of the procedure. What should be the procedure if I want to receive the treatment? Step 1: Detailed eye examination (about 2 hours). A standardized and thorough preoperative examination is essential to help design the best surgical plan and to lay the foundation for a good surgical outcome. The second step, surgery. The third step, regular post-operative follow-up.