Gauthier L
Espace Hélios, Layatz II, 8, rue de la Ferme-Dai-Baita, 64500 Saint-Jean-de-Luz, France.
J Fr Ophtalmol. 2012 Mar;35(3):206-11. doi: 10.1016/j.jfo.2011.12.001. Epub 2012 Mar 2.
Excimer laser is the best and the more used technique for Astigmatism correction. Lasik is generally preferred to PRK and must be the choice for hyperopic and mix astigmatisms. Myopic astigmatisms are the easier cases to treat: the length of the photoablation is placed on the flat meridian. Hyperopic and mix astigmatisms are more difficult to correct because they are more technically demanding and because the optical zone of the photoablation must be large. Flying spots lasers are the best for these cases. The most important point is to trace the photoablation very precisely on the astigmatism axis. The use of eye trackers with iris recognition or a preoperative marking of the reference axis avoid cyclotorsion or a wrong position of the head. Irregular astigmatism are better corrected with topoguided or wavefront guided photoablations.
准分子激光是矫正散光最好且使用最广泛的技术。与PRK相比，LASIK通常更受青睐，对于远视和混合性散光来说，它必定是首选。近视散光病例是较容易治疗的：光凝消融的长度设置在扁平子午线方向。远视和混合性散光更难矫正，因为它们对技术要求更高，而且光凝消融的光学区必须较大。飞点激光最适合这些病例。最重要的一点是要在散光轴上非常精确地进行光凝消融。使用带有虹膜识别功能的眼动追踪仪或术前标记参考轴可避免眼球旋转或头部位置错误。不规则散光采用地形图引导或波前引导的光凝消融矫正效果更佳。
