前房形态动态裂隙摄像测量系统的研制

The development of dynamic anterior chamber camera and measuring system with handed slit-lamp

目的 :设计制作一种前房形态动态裂隙摄像测量系统,对其精密度及可重复性进行检测 ,并应用其定量分析浅前房者在暗室俯卧试验过程中前房形态的变化。方法 :自行设计制作了前房形态动态裂隙摄像测量系统 ,然后用同一摄像系统拍摄标准米尺1张 ,测量计算其精密度。通过同一人对同一眼连续摄像测量10次及同一人对同一前房图像连续测量10次计算其可重复性。选取浅前房22例22只眼在暗室俯卧试验前后用本前房形态动态摄像测量系统摄像 ,并测量计算试验前后的前房深度及虹膜曲率半径。结果 :本摄像测量系统的精密度为0.035mm。变异系数为1.21%～3.69 %。22只浅前房眼在暗室俯卧后的前房深度小于暗室俯卧前 ,有统计学显著性差异 (P<0.01) ,试验后虹膜曲率半径小于试验前 ,差异有统计学显著性 (P<0.01)。结论 :本装置具备检测暗卧过程中晶体虹膜隔前移量及瞳孔阻滞力增加引起的虹膜膨隆程度改变量的能力 。

Objective To develop a camera and measuring system and examine its accuracy and intraobserver reproducibility. Then with the system to observe and quantitatively analyze the change of the anterior chamber of the shallow anterior chambers during dark-room prone test. Methods We calculated the accuracy by taking a photograph of a ruler with the dynamic camera. The consistency of camera and meansuring procedure was examined by taking ten exposures of one eye. The consistency of meansuring procedure was examined by making ten estimates of the anterior chamber depths from a single photograph on separate occasions. 22 shallow anterior chambers received dark-room prone test and taken photos by the dynamic camera. Results The reproducibility and accuracy of the method were 1.21%～3.69% and 0.035mm respectively. There is a statistically significant difference in ACD of the shallow anterior chambers before and after the test. It is the same with the radius of iris curvature before and after the test. Conclusion The instrument has the ability of recording the forward movement of the lens-iris diaphragm and the change of the bowing forward of the iris during the test. And its reproducibility and accuracy was found to be adequate for clinical study of human eye under physiologic or disease state.