Pentacam系统测量LASIK手术前后角膜最薄点位置改变  

Changes of the thinnest corneal point before and after laser in situ keratomileusis using a pentacam system

作　　者：陈亢[1] 华瑞[1] 王媛媛[1] 李梅[1] 刘汉强[1] 

机构地区：[1]中国医科大学附属第一医院眼科,沈阳110001

出　　处：《中国实用眼科杂志》2013年第9期1142-1144,共3页Chinese Journal of Practical Ophthalmology

摘　　要：目的探讨Pentacam测量准分子激光原位角膜磨镶术（laser in situ keratomileusis，LASIK）手术前后角膜最薄点位置的变化规律，为LASIK手术设计及提高手术安全性提供依据。方法应用Pentacam系统对70例（140只眼）进行检查，于LASIK术前和术后3个月获取角膜最薄点位置以及角膜最薄点与角膜顶点之间的距离，并对检查结果进行统计学分析。结果LASIK术前和术后角膜最薄点距角膜顶点分别为（0．617±0．188）mm和（0．359±0．162）mm，测量结果差异显著有统计学意义（t=16．343，P〈0．001）。LASIK术前和术后角膜最薄点距瞳孔中心点分别为（0．656±0．188）mm和（0．303±0．155）mm，手术前后比较有统计学意义（t=20．065，P〈0．001），术前角膜最薄点位于角膜顶点偏颞下方的占84．29％，术后角膜最薄点位于角膜顶点偏颞下方的占51．43％，术后角膜最薄点以角膜顶点为基准较术前向鼻上方移动了（0．258±0．187）mm，以瞳孔中心点为基准较术前向鼻上方移动了（0．353±0．208）mm，结果比较有统计学意义（t=6．12，P〈0．001）。结论LASIK术前和术后角膜最薄点多位于角膜顶点和瞳孔中心点偏颞下方，术前角膜最薄点更接近角膜顶点，而术后则更接近瞳孔中心点，术后角膜最薄点相对术前向鼻上方移动。Objective To explore the change of the position of the thinnest corneal point before and after LASIK with the pentacam measurement to provide the reference for the surgery design. Methods The position of the thinnest corneal point and the distance from the thinnest corneal point to the corneal vertex of 70 cases （140 eyes） were measured with the Pentacam before and 3 months after LASIK. The results were compared. Results The distance from the thinnest corneal point to the corneal vertex was 0.617±0.188mm before LASIK and 0.359±0.162mm 3 months after LASIK, there was a significant between two measurement results （P 〈0.001）, the distance from the thinnest corneal point to the pupil center was 0.656±0.188mm before LASIK and 0.303±0.155mm 3 months after LASIK, there was also a significant between two measurement results （P 〈0.001）. The thinnest point of cornea was mostly located in the inferotemporal of the corneal vertex according for 84.29% before LASIK and according for 51.43% after LASIK. it moved to the superonasal of 0.258±0.187mm based on the corneal vertex and it moved to the superonasal of 0.353±0.208mm based on the pupil center, there was a significant differences between the two sets of results （P〈0.001）. Con-clusions The thinnest point of cornea is located in the corneal vertex and pupil center＇s inferotempo-ral before and after LAStK. The thinnest point of cornea is closer to the corneal vertex than the pu-pil center before LASIK, but it is closer to the pupil center than the corneal vertex after LASIK. The thinnest point of cornea trends to move the superonasal after LASIK.

关 键 词：角膜 瞳孔 激光原位角膜磨镶术 

分 类 号：R779.63[医药卫生—眼科]