Orbscan Ⅱ眼前节分析仪与超声法测量近视眼角膜中央厚度及前房深度结果比较  

Comparison of orbscan Ⅱ and ultrasound methods measuring corneal thickness and anterior chamber depth

作　　者：庞辰久[1] 宋晓虹[1] 王丽娅[1] 刘苏冰 聂晓丽 

机构地区：[1]河南省眼科研究所河南省眼科中心,郑州450003 [2]河南武警总队医院眼科,郑州450052

出　　处：《眼科研究》2008年第10期780-783,共4页Chinese Ophthalmic Research

摘　　要：目的比较Orbscan Ⅱ眼前节分析仪、超声角膜测厚仪和A型超声测量仪测量角膜厚度与前房深度结果的差异,探讨近视眼患者前房深度与屈光状态的关系。方法对298例（596眼）近视眼患者分别用3种仪器进行眼部生物测量,对角膜厚度及前房深度测量结果进行比较,并分析前房深度与屈光度的关系。结果角膜厚度Orbscan Ⅱ测量为（551.02±34.99）μm（校正系数0.95）,超声测量为（552.08±31.61）μm,二者差异无统计学意义（P=0.097）。根据Orbscan Ⅱ测量角膜厚度结果进行分组,角膜厚度在530-569μm时2种方法测量结果差异无统计学意义（P=0.26）,当低于或大于此范围时,差异有统计学意义（P〈0.01）。前房深度Orbscan Ⅱ测量结果为（3.69±0.23）mm,超声法测量为（3.89±0.23）mm,二者差异有统计学意义（P〈0.01）。近视眼前房深度与屈光度无相关性（r=0.01,P=0.81）。结论Orbscan Ⅱ单一校正系数不能满足临床需要,对不同角膜厚度应设定不同校正系数。Orbscan Ⅱ测量前房深度较超声法测量深度少,对于近视眼患者,前房深度与屈光度无相关性。Objective Accurate measurement of corneal thickness and anterior chamber depth is important in refractive surgery.Orbscan Ⅱ is an usefull tool for measuring anterior segment data.This observation was comparing the measured outcomes of central corneal thickness （CCT） and anterior chamber depth （ACD） by Orbscan Ⅱ and ultrasound methods,and further more to evaluate the correlation between ACD and refractive status in myopic eyes.MethodsCCT and ACD were measured with Orbscan Ⅱ,ultrasonic pachymetry and A-scan ultrasound in 596 eyes of 298 patients.Paired t test was used to compare the difference of CCT values measured by the two methods using SPSS13.0 software,and Pearson correlation analysis was utilized to evaluate the correlation of ACD values with refraction.ResultsThe CCT was（552.08±31.61）μm in ultrasonic pachymeter measure group and （552.08±31.61）μm in Orbscan Ⅱ （acoustic factor 0.95） measure group without significant difference between them（P=0.097）.However,in 〈530μm and 〉570μm groups,the differences in CCT value was significant between the two measured methods（P〈0.01）.ACD was （3.89±0.23） mm measured by A ultrasound and （3.69±0.23）mm by Orbscan Ⅱ,showing a 0.2mm increase in ACD in A ultrasound measured group compared with Orbscan Ⅱ measured group（P〈0.01）.A positive correlation was seen between the two methods （r=0.82,P〈0.01）.But there was no significant correlation between ACD depth and myopic status.ConclusionThere is a good consistance in CCT values measured by ultrasonic pachymetry and Orbscan Ⅱ.Single acoustic factor is not suitble for all conditions.ACD value measured by A-scan ultrasound is deeper than that of Orbscan Ⅱ.

关 键 词：ORBSCAN Ⅱ 超声 角膜厚度 前房深度 

分 类 号：R778.11[医药卫生—眼科]