中华眼视光学与视觉科学杂志
中華眼視光學與視覺科學雜誌
중화안시광학여시각과학잡지
CHINESE JOURNAL OF OPTOMETRY OPHTHALMOLOGY AND VISUAL SCIENCE
2010年
6期
429-432
,共4页
郭海科%金海鹰%Gerd.U.AUFFARTH%张洪洋
郭海科%金海鷹%Gerd.U.AUFFARTH%張洪洋
곽해과%금해응%Gerd.U.AUFFARTH%장홍양
晶体,人工%屈光力计算%激光,准分子%角膜屈光手术%计算机软件
晶體,人工%屈光力計算%激光,準分子%角膜屈光手術%計算機軟件
정체,인공%굴광력계산%격광,준분자%각막굴광수술%계산궤연건
Lenses,intraocular%Power calculation%Lasers,excimer%Corneal refractive surgery%Computer software
目的 对准分子激光角膜屈光手术后人工晶状体屈光力的计算方法进行优化,并开发为计算机软件,评价其准确性与可靠性.方法 对人工晶状体屈光力计算方法进行优化,包括:角膜屈光力的矫正计算;人工晶状体有效位置的计算与双K值法(double-K method)的应用;标准化计算公式的应用.将计算方法编写为计算机应用软件(IOL calculator for post-refractive cases).应用该软件对49例角膜屈光手术后的白内障患者的人工晶状体屈光力进行计算,以白内障手术后实际屈光状态为标准,预测屈光状态与实际屈光状态之间的差异为预测误差,预测误差的绝对值为绝对预测误差.以SPSS 11.0软件分析预测误差与绝对预测误差的平均值与分布.结果 白内障手术后屈光状态为-2.50～0.75 D,平均为(-0.78±o.83)D,3眼(6.1%)为正视,36眼(73.5%)为近视,10眼(20.4%)为远视.预测误差为-1.26～1.96 D,平均(-0.02±0.75)D,接近于正视性屈光状态.绝对预测误差为0～1.96 D,平均(0.62±0.42)D,绝对预测误差≤0.5 D者19眼(38.8%),＞0.5 D且≤1.0 D者22眼(44.9%),＞1.0 D且≤1.5 D者7眼(14.3%),＞1.5 D 且≤2.0 D者1眼(2.0%).结论 通过优化计算方法与开发计算机软件,可以充分简化准分子激光角膜屈光手术后人工晶状体屈光力的计算过程,并提高计算的准确性与可靠性.
目的 對準分子激光角膜屈光手術後人工晶狀體屈光力的計算方法進行優化,併開髮為計算機軟件,評價其準確性與可靠性.方法 對人工晶狀體屈光力計算方法進行優化,包括:角膜屈光力的矯正計算;人工晶狀體有效位置的計算與雙K值法(double-K method)的應用;標準化計算公式的應用.將計算方法編寫為計算機應用軟件(IOL calculator for post-refractive cases).應用該軟件對49例角膜屈光手術後的白內障患者的人工晶狀體屈光力進行計算,以白內障手術後實際屈光狀態為標準,預測屈光狀態與實際屈光狀態之間的差異為預測誤差,預測誤差的絕對值為絕對預測誤差.以SPSS 11.0軟件分析預測誤差與絕對預測誤差的平均值與分佈.結果 白內障手術後屈光狀態為-2.50～0.75 D,平均為(-0.78±o.83)D,3眼(6.1%)為正視,36眼(73.5%)為近視,10眼(20.4%)為遠視.預測誤差為-1.26～1.96 D,平均(-0.02±0.75)D,接近于正視性屈光狀態.絕對預測誤差為0～1.96 D,平均(0.62±0.42)D,絕對預測誤差≤0.5 D者19眼(38.8%),＞0.5 D且≤1.0 D者22眼(44.9%),＞1.0 D且≤1.5 D者7眼(14.3%),＞1.5 D 且≤2.0 D者1眼(2.0%).結論 通過優化計算方法與開髮計算機軟件,可以充分簡化準分子激光角膜屈光手術後人工晶狀體屈光力的計算過程,併提高計算的準確性與可靠性.
목적 대준분자격광각막굴광수술후인공정상체굴광력적계산방법진행우화,병개발위계산궤연건,평개기준학성여가고성.방법 대인공정상체굴광력계산방법진행우화,포괄:각막굴광력적교정계산;인공정상체유효위치적계산여쌍K치법(double-K method)적응용;표준화계산공식적응용.장계산방법편사위계산궤응용연건(IOL calculator for post-refractive cases).응용해연건대49례각막굴광수술후적백내장환자적인공정상체굴광력진행계산,이백내장수술후실제굴광상태위표준,예측굴광상태여실제굴광상태지간적차이위예측오차,예측오차적절대치위절대예측오차.이SPSS 11.0연건분석예측오차여절대예측오차적평균치여분포.결과 백내장수술후굴광상태위-2.50～0.75 D,평균위(-0.78±o.83)D,3안(6.1%)위정시,36안(73.5%)위근시,10안(20.4%)위원시.예측오차위-1.26～1.96 D,평균(-0.02±0.75)D,접근우정시성굴광상태.절대예측오차위0～1.96 D,평균(0.62±0.42)D,절대예측오차≤0.5 D자19안(38.8%),＞0.5 D차≤1.0 D자22안(44.9%),＞1.0 D차≤1.5 D자7안(14.3%),＞1.5 D 차≤2.0 D자1안(2.0%).결론 통과우화계산방법여개발계산궤연건,가이충분간화준분자격광각막굴광수술후인공정상체굴광력적계산과정,병제고계산적준학성여가고성.
Objective To evaluate intraocular lens power calculation after laser refractive surgery using an optimized calculation method and self-designed computer software. Methods Intraocular lens power calculation method was optimized in the following aspects: corrective algorithm for corneal power estimation; algorithm for effective lens position estimation and double-K method for intraocular lens power calculation; and standardized formula for intraocular lens power calculation.The calculation method was programmed into self-designed computer software (IOL calculator for post-refractive cases). Forty-nine eyes after eximer-laser corneal refractive surgery were retrospectively studied. Intraocular lens power and calculated postoperative refraction were calculated by the optimized method using the computer software. The difference between calculated postoperative refraction and actual postoperative refraction (prediction error) and absolute prediction error were analyzed by SPSS 11.0 software. Results Mean postoperative refraction was (-0.78±0.83)D (-2.50～0.75 D). Three eyes (6.1%) were emmetropic, 36 eyes (73.5%) were myopic, 10 eyes (20.4%) were hyperopic. Mean prediction error was (-0.02±0.75)D(-1.26～1.96 D). Mean absolute prection error was (0.62±0.42)D(0～1.96 D), 19 eyes (38.8%) were ≤0.5 D, 22 eyes (44.9%) were ＞0.5 D and ≤1.0 D,7 eyes (14.3%) were ＞1.0 D and ≤1.5 D, 1 eye (2.0%) was ＞1.5 D and ≤2.0 D. No eye was higher than 2.0 D. Conclusion The computer software programmed with optimized calculation method is a reliable solution to the intraocular lens power calculation after laser corneal refractive surgery.
