LASIK手术前后应用Orbscan-Ⅱ对角膜前后表面高度不对称性散光的临床观察  

Clinical observation of asymmetrical astigmatism in Orbscan-Ⅱ anterior and posterior topography

作　　者：辛宝莉[1] 刘苏冰[1] 聂晓丽[1] 买志彬[1] 侯莹[1] 陶晨雯[1] 

机构地区：[1]武警河南总队医院眼科,河南郑州450052

出　　处：《眼外伤职业眼病杂志》2007年第12期934-936,共3页Journal of Injuries and Occupational Diseases of the Eye with Ophthalmic Surgeries

摘　　要：目的探讨行LASIK手术前后,近视散光在Orbscan-Ⅱ角膜地形图的前、后表面高度图中出现不对称性近视散光的疗效观察。方法25752例(51088眼)通过应用Orbscan-Ⅱ角膜地形图检查,发现207例(310眼)近视散光度的轴位,在角膜前表面高度图与后表面高度图形态表现为不对称的"CROSS"现象,对图形及术后视力进行了观察。结果207例(310眼)出现近视散光的"CROSS"现象,发生率为0.80%。术后5眼有剩余散光度,并且角膜地形图在后表面高度图中仍保留术前形态。结论随着屈光性角膜手术病例的增多,临床出现这种"十字"形态的"CROSS"现象,能针对这种现象在实施角膜屈光性手术中重新设计手术方案,从中体现了Orbscan-Ⅱ角膜地形图系统的临床应用价值。Objective To investigate the therapeutic observation of patients with myopic astigmatism before and after Laser corneal refractive surgeries. Methods In the pre-operational Orbscan-Ⅱ ,we found 207 cases （310 eyes） of 25752 cases （51088 eyes） whose axes of myopic astigmatism appeared asymmetrical in the anterior and posterior surface topographies. Then we analyzed the topographies and post-operational visual acuity. Results There were 0. 8% patients （217 cases,310 eyes） whose Orbscan-Ⅱ showed asymmetrical ＂cross＂ phenomenon. After surgeries 289 eyes achieved pre-operational corrective vision, 16 eyes remained - 0.5 DS,5 eyes had residual astigmatism -0. 5 - - 1.0 DC, so the incidence of incomplete rectification was 0. 019% and 0.8% with ＂cross＂ phenomenon. The residual astigmatisms retained pre-operational configuration in the posterior topographies. Conclusions As for ＂cross＂ phenomenon in clinic ,refractive corneal surgery can redesign refractive surgical plans through the measurement of Orbscan-Ⅱ corneal topographic system.

关 键 词：角膜前 后表面高度 散光度 屈光性角膜手术 “十字”形态 

分 类 号：R779.63[医药卫生—眼科]