A超检测高密度白内障患者眼轴的临床价值

The Clinical Value of A-scan In Patients With Dense Cataract

目的:探讨A超检测高密度白内障患者眼轴的临床价值。方法:裂隙灯检测患眼晶体混浊在Ⅳ级及以上、高频彩超检测并排除玻璃体及视网膜病变后,用A超测量眼轴并选择相应人工晶体,白内障超声乳化术后3个月IOL-Master在人工晶体眼模式下测量眼轴,验光记录平均绝对屈光误差。比较术前A超与术后IOL-Master的测量数据。结果:正常眼轴组和短眼轴组术前A超与术后IOL-Master的测量结果差异无统计学意义,长眼轴组两者差异有统计学意义。术后95.9%的病人平均绝对屈光误差控制在1.5D以内。结论:A超检测高密度白内障患者眼轴克服了IOL-Master的局限性,在它具有的精确程度上(0.10 mm),改进操作方法,减少操作误差,可以提高测量的准确性。

Objective：To evaluate the accuracy of ocular biometry measured with A-scan in patients with dense cataract. Methods： One hundred and fifty-seven patients（186eyes） with age-related cataract which the axial lengths cannot be measured by IOL-Master. The axial lengths measured by A-scan in 186 eyes before operation and measured with IOL-Master in artificial crystal eye mode underwent phacoemu｜sification with superior incision 3 months later. Results： In normal eyes and short axis eyes, the axial length of eye with dense cataract measured by reoperative A-scan and postoperative IOL-Master is closely equal and no statistical difference. In long axis eyes,there was stastistical differences（P〈0.05）. 95.9% of the patients postoperative ,the average absolute diopter errors can be controlled in 1.5D. Conclusions： It can be thought that A-scan measurement at level of 0. 1 mm is accurate. The A-scan measurement can offer the more exact and reliable date by there were statistical differences.