前房深度六点相对定量测量法的研究

The study of six points relative quantitative measurement of anterior chamber depth with slit lamp

目的:探索一种临床实用的前房深度相对定量测量法,初步确定老年人前房深度的正常参考值。方法:裂隙灯光源外转45°,受检眼直视裂隙光,在6点时钟方向测量六个点的前房深度(ABCDEF),以角膜缘处的角膜厚度(CT值)为1计。A:角巩膜缘黑白交界处;B:A点上移1CT;C:B点上移1CT;D:虹膜最高点;E:瞳孔缘;F:晶状体前极。测量了50～75岁的正常老年人,229例229眼,采用双盲法对22例44眼进行了11次重复性检测。结果:女性组ABCDEF点的前房深度均值分别为0.38,0.58,0.89,2.10,2.65和3.26CT;男性组分别为0.71,1.02,1.43,2.37,2.90,3.41CT。女性组每个点的深度均比男性浅(P<0.05),越近周边部越显著。结论:前房深度六点相对定量测量法可重复性好,实用性强。

AIM： To discover a relative quantitative measurement of the anterior chamber depth with slit lamp and to explore the normal reference values of old man＇s anterior chamber depth. METHODS, The light source of slit lamp was turned outward 45 degrees and the examined eye stared at the light. Anterior chamber depth of six points （ABCDEF） was measured at 6 o＇clock position. The corneal thickness at corneal limbus （CT value） was recorded as 1 CT. These six points were as follows, A. juncture of corneoscleral limbus; B. moving up 1 CT from A point; C： mouing up 1 CT from B point; D. the highest point of iris; E; the edge of pupil; F： anterior pole of lens. A total of 229 normal old men （119 cases） and women （110 cases） aged 50 to 75 years, 229 eyes were tested. Eleven times of repeated measurements were carried out on 44 eyes of 22 cases by double blind test. RESULTS： The mean anterior chamber depths at ABCDEF six points were 0. 38, 0. 58, 0. 89, 2. 10,2.65 and 3. 26CT respectively in old women group; and the mean anterior chamber depths at six points were 0. 71,1. 02,1. 43 , 2.37,2.90 and 3.41CT respectively in old men group. The mean anterior chamber depths at all six points in old women group were shallower compared with old men group（P〈 0.05）, especially at peripheral anterior chamber. The variance coefficient of each point was less than 10%. CONCLUSION, Results above show that the six points relative quantitative measurement of the anterior chamber depth by slit lamp has better practicability and repeatability.