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眼用准分子激光系选用193nm波长的紫外线光,即氟化氩(ArF)准分子激光,这是一种脉冲式激光,它可以精确地切削一定厚度的角膜,而很少损伤其余的角膜组织,它可以打断分子间及分子内的化合键,使分子彼此排斥,因此它不是一种热损伤。准分子激光角膜切削术就是将角膜前表面组织水平切削一小部分,使近视眼患者的屈光状态发生明显的改变,也就是将角膜中央前圆顶部变平,范围为5mm直径,经计算得知,每切削10μm厚角膜,大约可矫正1个屈光度近视,也就是说,激光切削50μm厚的角
The excimer laser for ophthalmology uses 193nm UV light, known as argon fluoride (ArF) excimer laser, which is a pulsed laser that precisely cuts a certain thickness of the cornea with minimal damage to the remaining corneal tissue , It can break the intermolecular and intramolecular chemical bonds, so that the molecules are mutually exclusive, so it is not a thermal damage. Excimer laser keratomileusis the level of corneal surface tissue cutting a small part of the refractive status of patients with myopia significantly changed, that is, the anterior corneal flattening of the anterior dome in the range of 5mm diameter, calculated Known, each cut 10μm thick cornea, about 1 diopter corrected myopia, that is, laser cutting 50μm thick angle