北京生物医学工程

基于几何学方法测量人工晶状体的移位

Measurement Method of Intraocular Lens Displacement Based on Geometry

作者：郁苏娟王珂闫岩宋旭东

单位：首都医科大学生物医学工程学院（北京100069）

分类号：

出版年·卷·期（页码）：2011·30·3（310-313）

摘要：

目的提出计算人工晶状体倾斜和偏心数值的方法，可应用于评价植入不同种类人工晶状体的效果等方面。方法基于两例先天性晶状体半脱位的术后人工晶状体眼前段图像，拟合人工晶状体，经过图像配准，再运用几何学理论进行计算，得到人工晶状体的倾斜角度和偏心数值。结果两例人工晶状体倾斜度数分别为2.667°和2.764°，偏心数值分别为0.630mm和1.397mm，在临床测量数值的范围内。结论基于几何学的测量人工晶状体倾斜和偏心数值的方法，有很好的重复性，简捷易推广，也适用于其他疾病手术后植入人工晶状体的情况。

Objective A new method was proposed for calculating the tilt and decentration values of intraocular lens (IOL), and it was available to evaluate the effects of various types of IOL implantation and other conditions. Methods Based on anterior segment images of IOL from two patients, who suffer from the congenital subluxation of the crystalline lens after operation, the IOL tilt angle and the decentration value were obtained through curve fitting, image registration and basic geometric theories. Results The IOL tilt angles of 2 cases were 2.667° and 2.764° respectively, and the decentration values were 0.630mm and 1.397mm, which were all in the clinical ranges. Conclusion Geometry-based method to measure the IOL tilt and decentration values is reasonable and simple with a good repeatability, which is also available for other circumstances implanting with IOL.

参考文献：

［1］Assia E I,Yokrat Ton,Adi Michaeli.Capsule anchor to manage subluxated lenses:Initial clinical experience［J］. J Cataract Refract Surg,2009,35(8):1372-1379.
［2］Korynta J,Bok J,Cendelin J,et al.Computer modeIing of visuaI impairment caused by intraocular lens misalignment［J］. J Cataract Refract Surg,1999,25:100-105.
［3］Oshika T,Sugita G,Miyata K,et al.Influence of tilt and decentration of scleral-sutured intraocular lens on ocular higher-order wavefront aberration［J］.Br J Ophthalmol,2007,91:185-188.
［4］Nemeth G,Vajas A,Tsorbatzoglou A,et a1.Assessment and reproducibility of anterior chamber depth measurement with anterior segment optical coherence tomography compared with immersion ultrasonography［J］.J Cataract Refract Surg,2007,33:443-447.
［5］邢晓杰,汤欣,宋慧,等.四种非球面人工晶状体植入术后倾斜和偏心的比较［J］.中华眼科杂志,2010,46(4):332-336.

服务与反馈：

【文章下载】【加入收藏】

提示：您还未登录，请登录！点此登录