The excimer laser is a fluorinated argon dimer that, when excited by energy, produces an ultraviolet beam with a wavelength of 193 nm, which precisely ablates the part of the cornea that is expected to be removed without damaging surrounding tissues or other organs, and because it is a cold laser, it does not have a thermal effect on the tissue next to the irradiated area. With this precise ablation, laser cutting does not penetrate the cornea, making it safer. Therefore, there are no side effects on the tissues inside the eye and no side effects or after-effects.