193nm准分子激光切削角膜的研究

基金项目:

江苏省"十五"高技术研究计划资助项目

详细信息

Research of ablation of 193nm excimer laser on cornea

摘要: 193nm准分子激光对角膜的消融机理是眼屈光性手术如LASIK和PRK中的重点问题.首先分析两种描述193nm准分子激光对角膜的消融机理的模型:光蚀除模型和光物理模型,得出能量密度与角膜切削深度的关系.并且研究影响屈光手术效果稳定性与可预见性的因素,在此基础上优化激光的扫描算法.研究结果直接应用于准分子激光屈光矫正系统,在实际应用中取得了很好的效果.
- 准分子激光 /
- 角膜 /
- 消融 /
- 扫描算法
Abstract: The mechanism of action of excimer laser (ArF:193nm 8ns) on cornea is very important in the ablation refractive surgeries such as laser in situ keratomileusis(LASIK)and photorefractive keratectomy(PRK).In this paper,we analyze photoablation model and photophysical model that describe the mechanism of action of excimer laser (ArF:193nm 8ns) on cornea,elicit the relationship between the energy density and the ablation depth.The factors that would influence the predictability and stability of the photorefractive surgery outcome are also investigated.Then the scanning algorithm can be optimized.The results have been directly applied to the ophthalmic excimer laser system and obtain satisfactory effect in diopter correction.
- excimer laser /
- cornea /
- photoablation /
- scanning algorithm

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