IOL-Master在人工晶状体屈光度计算中的精确性研究

Accuracy of IOL-Master for power calculation of artifical intraocular lens

目的评价IOL-Master在人工晶状体屈光度计算中的临床应用价值。方法对160眼白内障分别运用IOL-Master与A型超声波测量眼轴,术后1月、3月行屈光检查。结果IOL-Master测量眼轴:22<L≤24.5mm组平均轴长为(23.75±0.56)mm,24.5<L≤26mm组平均轴长为(25.21±0.61)mm,L>26.0mm组平均轴长为(28.87±0.58)mm。A型超声波测量眼轴,上述3个组平均轴长依次为:(23.68±0.81)mm,(25.01±0.90)mm,(29.33±1.02)mm。术后1月,L>26.0mm组,A超组和IOL-Master组的平均等效球镜屈光度误差为(1.449±0.723)D及(0.875±0.682)D(P<0.001)。术后3月,L>26.0mm组,A超组和IOL-Master组的平均等效球镜屈光度误差为(1.345±0.714)D及(0.865±0.683)D(P<0.001)。结论IOL-Master在人工晶状体屈光度计算方面具有极高的临床应用价值。

Objective To evaluste the clinical aplication and Accuracy of IOL-Master for Power Calculation of Artificial Intraocular Lens. Methods Data was analyzed from 160 eyes with age-related cataracts who underwent phacoemulsification and lens implantation in our hospital from Jan. 2007 to Fed. 2007. The length of ocular axis and keratometric power were measured preoperatively by IOL-Master,uhrasonic biometry and auto-keratometer. Their refraction outcome were followed-up 1-3 month after operation. Results The ocular axial length that measured by IOL-Master was （ 23.75 ± 0. 56） mm in 22 〈 L ≤ 24.5 mm group, （ 25.21 ± 0.61 ） mm in 24.5 〈L≤26 mm group,and （28.87 ±0.58）mm in L 〉26.0 mm group. The ocular axial length of the three groups that measured by A-scan ultrasonic biometry were （23.68 ± 0.81 ） mm, （25.01 ± 0.90） mm and （29.33 ± 1.02）mm respectively. One month after surgery,the mean absolute refractive error in L 〉 26.0 mm group was （ 1. 449 ± 0.723 ） D by A-scan, and was （0.875 ± 0. 682 ） D by IOL-Master （ P 〈 0. 001 ）. That was （ 1. 345 ± 0. 714 ） D measured by A-scan and was （0. 865 ± 0. 683 ） D measured by IOL-Master （P 〈 0. 001 ） 3 months after surgery. Conclusions IOL-Master has high clinical value for calculating the power of artificial IOLs.