中国实用眼科杂志
中國實用眼科雜誌
중국실용안과잡지
CHINESE JOURNAL OF PRACTICAL OPHTHALMOLOGY
2011年
8期
847-851
,共5页
白内障%先天性%IOL计算%预测误差
白內障%先天性%IOL計算%預測誤差
백내장%선천성%IOL계산%예측오차
Cataract%Congenital%IOL power calculation%Prediction error
目的 分析儿童眼人工晶状体度数计算的准确性.方法 回顾性研究37例(62只眼)行先天性白内障摘除加人工晶状体(IOL,intraocular lens)植入术患儿生物测量及屈光状态数据,应用SRKⅡ计算IOL度数.术后2个月行视网膜检影验光检测屈光状态.分析手术年龄,眼轴长度,IOL植入时机与IOL度数计算准确性关系.结果 全部平均绝对预测误差为(1.56±1.43)D.绝对预测误差低于1.0 D共32只眼,占总眼数52%.眼轴≤20 mm组绝对预测误差为(2.75±1.66)D,＞20 mm组为(1.06±0.93)D,2组间差异具有统计学意义(P＜0.01).年龄≤2岁组绝对预测误差为(2.38±1.65)D,＞2岁为(1.04±0.99)D,2组间差别具有统计学意义(P＜0.01).Ⅰ期IOL植入组绝对预测误差为(1.37±1.35)D,Ⅱ期IOL植入为(2.03±1.56)D,2组间差异无统计学意义(P=0.22).结论 全组植入的IOL度数安全有效.眼轴≤20 mm及年龄≤2岁患儿绝对预测误差明显增加.该研究证明,专门为儿童眼设计IOL计算公式是有必要的.
目的 分析兒童眼人工晶狀體度數計算的準確性.方法 迴顧性研究37例(62隻眼)行先天性白內障摘除加人工晶狀體(IOL,intraocular lens)植入術患兒生物測量及屈光狀態數據,應用SRKⅡ計算IOL度數.術後2箇月行視網膜檢影驗光檢測屈光狀態.分析手術年齡,眼軸長度,IOL植入時機與IOL度數計算準確性關繫.結果 全部平均絕對預測誤差為(1.56±1.43)D.絕對預測誤差低于1.0 D共32隻眼,佔總眼數52%.眼軸≤20 mm組絕對預測誤差為(2.75±1.66)D,＞20 mm組為(1.06±0.93)D,2組間差異具有統計學意義(P＜0.01).年齡≤2歲組絕對預測誤差為(2.38±1.65)D,＞2歲為(1.04±0.99)D,2組間差彆具有統計學意義(P＜0.01).Ⅰ期IOL植入組絕對預測誤差為(1.37±1.35)D,Ⅱ期IOL植入為(2.03±1.56)D,2組間差異無統計學意義(P=0.22).結論 全組植入的IOL度數安全有效.眼軸≤20 mm及年齡≤2歲患兒絕對預測誤差明顯增加.該研究證明,專門為兒童眼設計IOL計算公式是有必要的.
목적 분석인동안인공정상체도수계산적준학성.방법 회고성연구37례(62지안)행선천성백내장적제가인공정상체(IOL,intraocular lens)식입술환인생물측량급굴광상태수거,응용SRKⅡ계산IOL도수.술후2개월행시망막검영험광검측굴광상태.분석수술년령,안축장도,IOL식입시궤여IOL도수계산준학성관계.결과 전부평균절대예측오차위(1.56±1.43)D.절대예측오차저우1.0 D공32지안,점총안수52%.안축≤20 mm조절대예측오차위(2.75±1.66)D,＞20 mm조위(1.06±0.93)D,2조간차이구유통계학의의(P＜0.01).년령≤2세조절대예측오차위(2.38±1.65)D,＞2세위(1.04±0.99)D,2조간차별구유통계학의의(P＜0.01).Ⅰ기IOL식입조절대예측오차위(1.37±1.35)D,Ⅱ기IOL식입위(2.03±1.56)D,2조간차이무통계학의의(P=0.22).결론 전조식입적IOL도수안전유효.안축≤20 mm급년령≤2세환인절대예측오차명현증가.해연구증명,전문위인동안설계IOL계산공식시유필요적.
Objective To determine the accuracy of intraocular lens (IOL) power calculation in a group of pseudophakic children. Methods A relrospective analysis of biometric and refractive data was performed on 62 eyes of 37 infants and children, who successfully underwent cataract extraction and IOL implantation. SRKII were used to calculate the IOL power. The postoperative refractive outcome was taken as the spherical equivalent of the refraction at 2 months afier surgery by retinoscopy. The data were analyzed to assess the effects of age at the time of surgery, axial length, and primary or secondary intraocular lens implantation on the accuracy of calculation of IOL power. Results For the overall group the mean and median prediction errors were 1.56D (SD 1.43). There were 32 eyes'absolute predictions errors lower than 1D (52%). The mean absolute prediction errors in eyes with axial lengths≤20 mm were 2.75 D (SD 1.66), and in eyes ＞20 mm were 1.06 D (SD 0.93). The mean absolute prediction errors in eyes in children aged≤2 years were 2.38 D (SD 1.65), and in children aged ＞2 years were 1.04D (SD 0.99). The differences between the absolute prediction errors for both axial length and age were statistically significant (P ＜0.01). The mean-absolute prediction errors in eyes with primary IOL implantation were 1.37D (SD 1.35), and secondary intraocular lens implantation were 2.03D (SD 1.56). The differences between the absolute prediction errors primary or secondary intraocular lens implantation, were not statistically significant (P =.22). Conclusions For the overall group IOL power calculation is generally acceptable. In eyes with axial lengths less than 20 mm and in children younger than 2 years of age larger errors can arise, and the variations increase. This study demonstrates the need for an IOL formula specifically designed for pediatric use.
