Petrowitz R, Dahmen H, Egelhaaf M, Krapp H G
Lehrstuhl für Neurobiologie, Fakultät für Biologie, Universität Bielefeld, Germany.
J Comp Physiol A. 2000 Jul-Aug;186(7-8):737-46. doi: 10.1007/s003590000127.
We determined the optical axes of ommatidia in the wild-type female blowfly Calliphora by inspecting the deep pseudopupil in large parts of the compound eye. The resulting map of optical axes allowed us to evaluate the spatial resolution in different parts of the eye in terms of interommatidial angles as well as the density of optical axes, and to estimate the orientation of ommatidial rows along the hexagonal eye lattice. The optical axes are not homogeneously distributed over the eye. In the frontal visual field the spatial resolution is about two times higher than in its lateral part and about three times higher as compared to the eye's dorsal pole region. The orientation of the ommatidial rows along the eye lattice is not the same for different regions of the eye but changes in a characteristic way. The inter-individual variability in the orientation of the ommatidial rows is estimated to be smaller than 8 degrees . The characteristic arrangement of the ommatidial lattice is discussed as an adaptation for efficient evaluation of optic flow as induced during self-motions of the animal.
我们通过检查复眼大部分区域的深伪瞳孔，确定了野生型雌性丽蝇（Calliphora）小眼的光轴。由此得到的光轴图使我们能够根据小眼间角度以及光轴密度来评估眼睛不同部位的空间分辨率，并估计小眼排沿着六边形眼晶格的方向。光轴在眼睛上并非均匀分布。在额叶视野中，空间分辨率比其外侧部分高约两倍，与眼睛的背极区域相比高约三倍。小眼排沿着眼晶格的方向在眼睛的不同区域并不相同，而是以一种特征性的方式变化。小眼排方向的个体间变异性估计小于8度。小眼晶格的特征排列被认为是一种适应机制，用于有效评估动物自身运动过程中产生的光流。
