◆ What is excimer laser In the early 1980s, researchers discovered that the new excimer laser used by IBM to make high-precision computerized zinc sheets could be applied to refractive surgery. Unlike other lasers that can cause tissue damage, the cold light from the excimer laser does not cause any thermal damage and is accurate. The ultraviolet and high-energy pulses from the excimer laser can separate corneal molecules in a fraction of a billionth of a second with an accuracy of 0.25 microns. The beam of the excimer laser is so fine that it takes more than 200 pulses to remove a thickness like a hair. The first use of the excimer laser to treat myopia was done in 1988. Since the application of this technology, the excimer laser has undergone many improvements and is now commonly used in various developed countries around the world. The excimer laser is an ultraviolet light beam with a wavelength of only 193 nanometers, which is invisible to the human eye. The excimer laser is characterized by its high photon energy, extremely short wavelength, and extremely weak penetration into the tissues. After the flap is flipped, the excimer laser is used under computer control to precisely vaporize the part of the corneal stroma to be removed under the flap, and then the flap is flushed and reset under the flap to change the shape of the anterior surface of the cornea and adjust the refractive power of the cornea so that external light can be accurately converged in the This changes the shape of the anterior corneal surface and adjusts the refractive power of the cornea so that external light can be accurately converged in the fundus of the eye to correct myopia, hyperopia or astigmatism. Excimer laser is safe and reliable Predictive: A series of examination data such as the patient’s optometry, eye pressure condition, eye structure, corneal thickness, etc. are input into the excimer laser host system for automatic analysis and programming, so as to predict the post-operative effect and formulate a treatment plan according to the patient’s requirements. The post-operative results can be made known to the patient early before surgery. Safe and reliable: Excimer laser treatment for myopia is a simple and delicate procedure with a high degree of instrument automation and is minimally invasive. The laser vaporizes the corneal tissue in only 20-30 seconds. The excimer laser has no thermal effect and weak penetration, it does not damage the integrity of the eye, and there is no significant pain during and after surgery, and no hospitalization is required. Myopic laser surgery safety and surgical results: short recovery period: no obvious pain after laser surgery, no need to cover the operated eye after surgery, slight discomfort in the operated eye within 24 hours, and normal work and study in 2-3 days.