Due to the impact of the “Cai Feng Knife” incident in Taiwan, many myopic patients began to doubt the safety of myopia surgery and gave up their dream of removing their glasses in pursuit of light. In fact, with the continuous updating of medical equipment and the improvement of doctors’ skills, laser myopia surgery has developed to a fairly mature stage and its safety has been widely recognized. The probability of serious complications is extremely low, and if problems do occur, they mostly occur in the early stages of the technology, and are mostly due to pre-operative examinations not being strictly in place, indications not being strictly grasped, or equipment factors. The use of the femtosecond laser has made a quantum leap in the safety and efficacy of myopia surgery. Femtosecond laser technology, a cutting-edge technology in today’s laser eye science community, is a laser that operates in pulses of very short duration, only a few femtoseconds (one femtosecond is one trillionth of a second), and the femtosecond laser can be focused to a multi-space area smaller than the diameter of a hair and used for microfine processing. Therefore, replacing the corneal laminate knife with a femtosecond laser makes the myopia surgery process more precise, less traumatic and more predictable to the cornea. Femtosecond laser makes the surgery knifeless. Since the whole process of femtosecond laser surgery is completely controlled by a computer program, it can be said that the femtosecond laser flap making process makes the surgery safe. Femtosecond laser risks are avoided, and since no mechanical knife is used, the application of the femtosecond laser truly makes LASIK surgery blade-free. Moreover, the blade-free operation of the surgical procedure avoids physical infections and injuries of sudden advancement, and the surgical treatment is more pure. Femtosecond laser is more precise, in the laser myopia surgery, the traditional flap making process is done by human operated metal corneal knife, there is a certain risk, and, mechanical failure and human error can not be controlled. The “femtosecond laser” is basically controlled by a computer, which can avoid the possible risks of femtosecond laser due to mechanical failure, such as broken corneal flap, free flap, stuck knife, incomplete corneal flap, etc., making the surgery safer. A. Corneal flap restoration is more accurate: the corneal flap made by femtosecond laser is embedded with the stroma of the eye in an “underground manhole cover” type of occlusion, which can be easily restored and tightly occluded without misalignment and without complications such as shattered flap and button flap. This is one of the advantages of femtosecond laser treatment for hyperopia that is worth mentioning. Second, femtosecond laser treatment for hyperopia eliminates medically-derived infections: femtosecond laser knifeless surgery makes surgery on the human cornea a complete farewell to the lamellar knife, and the occurrence of cross-infection during surgery becomes history. Third, higher precision: Femtosecond laser treatment for hyperopia can control the accuracy of corneal flap making within ±5 microns, and the higher safety of femtosecond speaks for itself. The laser can precisely open the molecular chain of eye tissues to produce a more uniform and perfect flap, avoiding medical aberrations and allowing the hyperopic patient to obtain a more perfect visual quality. Femtosecond laser surgery has brought myopia surgery into a truly blade-free era. Femtosecond laser surgery reduces the psychological burden of the patient, and it sounds like the procedure is not so intimidating and the risks of surgery are relatively reduced, so this technology does bring many benefits to the patient. Femtosecond laser is especially useful for people with thin corneas or high night vision requirements. Most people with myopia can choose femtosecond laser surgery if they don’t consider the financial implications. Because femtosecond laser equipment is expensive, there is still a big difference in price compared to normal myopia surgery in China. Femtosecond laser surgery is suitable for those who are: 1. 18 years of age or older. 2.People who were not suitable for traditional LASIK surgery in the past because of thin corneas and high myopia. 3, smaller eyes, flatter corneas, small corneal diameter, and difficulties in flap making with a keratome. 5, patients who have concerns about cutting the cornea with a mechanical metal corneal lamellar knife; those who have high requirements for visual quality. Femtosecond laser is focused on a certain position of the cornea, very precise, you can imagine it as a very precise cutting tool, the thickness of the flap is very precise control, can cut a thinner and more uniform corneal flap, so that the number of correctable degrees increased significantly. One of its biggest advantages is precision and the second is safety.