Bacskulin A, Bergmann U, Horóczi Z, Guthoff R
Augenklinik, Universität Rostock.
Klin Monbl Augenheilkd. 1995 Oct;207(4):247-52. doi: 10.1055/s-2008-1035376.
Slitlamp observations of the position of the ciliary body behind the iris root are possible only in cases of gross anatomic, and probably also functional, abnormalities. This study was performed to investigate physiological changes of the human ciliary body configuration during accommodation.
We used the 50 MHz ultrasound biomicroscope to measure the ciliary body changes in 5 left eyes of normal subjects during accommodation, while the right eye, wearing corrective spectacles, focussed Snellen letters at a distance of 3 m. For desaccommodation plus lenses were utilized, while negative lenses were applied to blur vision as a stimulus for accommodation. During postprocessing the best images of the video sequence were recalled on a monitor and the profile of the ciliary body was manually drawn on a transparent folder. For interpretation we used a projection system with vector analysis.
During accommodation there is a shift of the ciliary body anteriorly toward the scleral spur and in the direction of the lens equator. In 4 out of 5 eyes a contact between the ciliary body and the posterior iris surface could be demonstrated. There was a measurably widening of the anterior chamber angle in 3 out of 5 eyes.
Ultrasoundbiomicroscopy seems to be a way for assessing ciliary body deformation during accommodation. Our results are in accordance with histologic and gonioscopic findings and confirm biomechanical theories of the accommodation process. Further investigations including online digital image processing will be necessary to evaluate accommodation in its complexity.
仅在存在明显解剖学异常以及可能的功能异常的情况下，才有可能通过裂隙灯观察虹膜根部后方睫状体的位置。本研究旨在调查人眼在调节过程中睫状体形态的生理变化。
我们使用50兆赫超声生物显微镜，对5名正常受试者的左眼在调节过程中的睫状体变化进行测量，同时受试者的右眼佩戴矫正眼镜，注视3米远处的斯内伦视力表字母。为了使眼睛放松，使用了正透镜，而使用负透镜使视力模糊作为调节的刺激。在后期处理过程中，在监视器上调出视频序列的最佳图像，并在透明文件夹上手绘睫状体轮廓。为了进行分析，我们使用了带有矢量分析的投影系统。
在调节过程中，睫状体向前朝着巩膜突并沿晶状体赤道方向移动。5只眼中有4只眼可显示睫状体与虹膜后表面接触。5只眼中有3只眼前房角有可测量的增宽。
超声生物显微镜似乎是评估调节过程中睫状体变形的一种方法。我们的结果与组织学和前房角镜检查结果一致，并证实了调节过程的生物力学理论。有必要进行包括在线数字图像处理在内的进一步研究，以评估调节的复杂性。
