北京生物醫(yī)學工程

基于幾何學方法測量人工晶狀體的移位

Measurement Method of Intraocular Lens Displacement Based on Geometry

作者：郁蘇娟王珂閆巖宋旭東

單位：首都醫(yī)科大學生物醫(yī)學工程學院（北京100069）

分類號：

出版年·卷·期（頁碼）：2011·30·3（310-313）

摘要：

目的提出計算人工晶狀體傾斜和偏心數(shù)值的方法，可應用于評價植入不同種類人工晶狀體的效果等方面。方法基于兩例先天性晶狀體半脫位的術后人工晶狀體眼前段圖像，擬合人工晶狀體，經(jīng)過圖像配準，再運用幾何學理論進行計算，得到人工晶狀體的傾斜角度和偏心數(shù)值。結(jié)果兩例人工晶狀體傾斜度數(shù)分別為2.667°和2.764°，偏心數(shù)值分別為0.630mm和1.397mm，在臨床測量數(shù)值的范圍內(nèi)。結(jié)論基于幾何學的測量人工晶狀體傾斜和偏心數(shù)值的方法，有很好的重復性，簡捷易推廣，也適用于其他疾病手術后植入人工晶狀體的情況。

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.

參考文獻：

［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］邢曉杰,湯欣,宋慧,等.四種非球面人工晶狀體植入術后傾斜和偏心的比較［J］.中華眼科雜志,2010,46(4):332-336.

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