Förster W, Kasprzak H, von Bally G, Busse H
Klinik und Poliklinik für Augenheilkunde, Westf. Wilhelms-Universität Münster.
Klin Monbl Augenheilkd. 1992 Jan;200(1):54-9. doi: 10.1055/s-2008-1045716.
Double-exposure holographic interferometry is used for deformation analysis of the surface of bovine corneas subjected to intraocular pressure increase. Reproducible individual fringe patterns are recorded for an intraocular pressure of 1340 Pa and subsequent pressure changes of 20, 40 and 80 Pa, respectively. These interference fringes characterize loci of equal displacement. In spite of interindividual variations of the central fringe pattern some basic types can be differentiated: round, oval, drop-like, double-centers, symmetrical as well as unsymmetrical and irregular forms. The peripheral fringe patterns of the cornea can be described by 3 basic types, even taking into account individual variations: circular, circular with an irregular component and irregular. The precision of the method allows to visualize minute local elasticity differences. Results of these investigations do not support the assumption, that the center of the cornea has a higher elasticity than peripheral regions in general. These elasticity differences between central and peripheral areas vary between individual corneas for small intraocular pressure changes at a basic pressure of ca. 10 mm Hg (1340 Pa).
双曝光全息干涉测量法用于对承受眼内压升高的牛眼角膜表面进行变形分析。分别记录了眼内压为1340 Pa以及随后眼内压分别变化20、40和80 Pa时可重复的个体条纹图案。这些干涉条纹表征了等位移位点。尽管中央条纹图案存在个体差异，但仍可区分出一些基本类型：圆形、椭圆形、水滴状、双中心型、对称型以及不对称和不规则型。即使考虑到个体差异，角膜的周边条纹图案也可由3种基本类型来描述：圆形、带有不规则成分的圆形和不规则型。该方法的精度能够可视化微小的局部弹性差异。这些研究结果不支持角膜中心通常比周边区域具有更高弹性这一假设。在约10 mmHg（1340 Pa）的基础压力下，对于小的眼内压变化，中央和周边区域之间的这些弹性差异在个体角膜之间有所不同。
