Abstract: excimer laser corneal refractive therapy technology (LASEK, LASIK and other technologies) is to use the computer-controlled excimer laser beam to cut the front surface of the cornea and flatten it slightly, so that the external light can accurately converge in the retina and image, so as to achieve the purpose of correcting myopia.
Excimer laser is a kind of ultraviolet light excited by fluorine argon gas mixing. It is a cold laser. It can accurately ablate the part of human cornea that is expected to be removed without damaging surrounding tissues and other tissues and organs. Its wavelength is very short. What it has with biological tissue is photochemical effect rather than thermal effect. Therefore, it will not produce thermal damage. In addition, the excimer laser wave is long and the penetration is weak. Each pulse can only cut the depth of 0.25um. It is horizontal cutting under the cell, and the cutting is very accurate. Therefore, it has no damage to the internal structure of the eyeball.
at present, excimer lasers are equipped with infrared or radar eye tracking systems. When your eye deflection exceeds the normal range, the laser will automatically stop cutting to ensure the safety and accuracy of treatment. The principle of
excimer laser in the treatment of myopia is that myopia is caused by the long anterior posterior diameter of the eyeball or the convex anterior surface of the eyeball, and the external light cannot accurately converge in the fundus retina. Excimer laser corneal refractive therapy technology (LASEK, LASIK and other technologies) is to use the computer-controlled excimer laser beam to cut the front surface of the cornea and flatten it slightly, so that the external light can accurately converge and image in the retina, so as to achieve the purpose of correcting myopia.
Throughout the excimer laser itself: cold laser, extremely low penetration and the surgical site for correcting myopia: the anterior surface of the cornea, which does not enter the eye, greatly reducing the risk of intraocular infection. Be sure to go to a regular eye hospital for detailed preoperative examination before operation, which can greatly reduce the operation risk. Through detailed examination, let the doctor analyze the results for you and determine the best operation scheme for you.
in addition, Many friends who are excited to take off their glasses should remember: go to the regular eye hospital for mydriasis and fundus examination every six months to one year (this has nothing to do with excimer laser surgery, but has something to do with your myopia, because people with myopia have a longer anterior posterior diameter of the eye, and the chances of retinal degeneration, perforation and retinal net detachment are more than 6 times higher than those of normal eyes.)