Lenstar LS900与角膜超声测厚仪测量角膜中央厚度的对比观察

摘要

目的 比较lenstar LS 900与角膜超声测厚仪测量人中央角膜厚度(CCT)的差异,为临床检查提供参考.方法 选取屈光手术者26例(52只眼),分别用lenstar LS 900和角膜超声测厚仪测量双眼CCT,两种仪器均测量3次或以上,取其平均值,对所得数据进行统计学分析.结果 52只眼CCT测量结果:lenstar LS 900为(538 27±40.38) μm,A超为(534.15±41.12)μm.两种测量方法 结果 差异有统计学意义(t=2.9643,P<0 005).但测量结果 高度相关(r=0.970),前者所测CCT较后者厚(4.11±10.11)μm.结论 lenstar LS 900与角膜超声测厚仪对CCT的测量结果 呈较高的相关性,两种仪器具有较高的测量准确性,lenstar LS 900可以作为角膜厚度的测量工具之一.%Objective To compare two method to measure central corneal thickness and to provide a reference for clinical examination. Methods Measure central corneal thickness of 26 patients (52 eyes) before the refractive operation respectively with lenstar LS 900 and A ultrasound pathymetry. Two instruments were measured for 3 times or more, take the average value, the data obtained were statistically analyzed. Results Central corneal thickness value :LS 900 (538. 27 + 40. 38) μm,A ultrasonic (534. 15 + 41. 12) μm. Two methods for measuring result difference has statistics significance ( t =2.9643, P <0.005). But the measurement results were highly correlated ( r = 0.970). The former is (4. 11 + 10. 11) μm thicker than the latter. Conclusion Lenstar LS 900 and A ultrasound pathymetry showed a high correlation . Both of the instruments have high measuring accuracy . Lenstar 900 can be used as a tool of measuring corneal thickness .