摘要
目的比较A超、A超和B超联合、IOL-Master三种方法测量高度轴性近视白内障患者眼轴的准确性。方法分析2004年5月至2004年10月在我院行白内障超声乳化摘除及人工晶状体植入术的高度轴性近视白内障患者23人(35眼),分别用接触式A超、A超和B超联合、IOL-Master三种方法测量眼轴长度,IOL-Master测量角膜曲率,SRK/T公式计算IOL度数,术后1个月检查患者屈光状态。结果接触式A超测量的眼轴均值为(29.80±1.95)mm,A、B超联合方法为(29.88±1.76)mm,IOL-Master为(29.96±1.99)mm;接触式A超与A、B超联合方法间比较差异无显著性意义(t=-0.143,P=0.887),和IOL-Master间差异亦无显著性意义(t=-0.353,P=0.725)。术后1个月绝对屈光误差≤±0.50D者接触式A超多于A、B超联合方法,χ2检验差异有显著性(χ2=5.04,P<0.05),与IOL-Master间χ2检验,差异无显著性(χ2=2.95,P>0.05);绝对屈光误差≤±1.00D者,接触式A超与其他两组间χ2检验差异均无显著性。结论采取注视状态下,接触式A超测量眼轴准确性较高;而A超和B超联合方法测量变异度较大;IOL-Master为我们提供了生物学测量的新选择,对高度轴性近视白内障手术人工晶状体的选择有重要意义。
Objective To compare 3 methods of axial length measurement, contact A- scan, A- scan combined B- scan and IOL Master in high myopia with cataract. Methods To analyze the data of the 23 patients （35 eyes）, who were all high myopia with cataract and accepted the phacoemulsification and foldable lens implantation in our hospital from May in 2004 to Oct. in 2004. The measurement of axial length was performed in 35 eyes by contact A scan, A- scan combined B- scan and IOL- Master, respectively. Keratometric power were measured preoperatively by IOL Master. And IOL power calculation was carried out according to SRK/T formula in the basis of IOL Master. Their refraction outcome were fellow - up one month after operation. Results The axial length was （29.80 ± 1.95） mm by contact A - scan, and （29.88 ± 1.76） mm, （ 29.96 ± 1.99） mm by A - scan combined B - scan and IOL- Master, respectively. There were not significant difference between contact A- scan and A- scan combined B- scan （t = -0. 143, P =0.887）, and aim not significant difference between contact A- scan and IOL- Master （t= -0.353, P = 0.725）. The mean absolute refractive error （MARE）, one month after operation, within±0.50 diopter in contact A-Scan and A scan combined B- scan were significant difference （X^2 = 5.04, P〈0.05）; in contact A .Scan and IOL Master were not significant difference （X^2 =2.95, P〉0.05）; within ± 1.00 diopter were not significant difference between contact A- scan and the two methods, respectively. Conclusions The contact A Scan is more accurate since the patients is asked to fixate onto the light on the probe; the A-scan combined B- scan is not a good method; and IOL- Master is another better choice to measure the axial length in high myopia with cataract.
出处
《中国实用眼科杂志》
CSCD
北大核心
2005年第9期972-974,共3页
Chinese Journal of Practical Ophthalmology
