Drasdo Neville, Millican C Leigh, Katholi Charles R, Curcio Christine A
School of Optometry and Vision Sciences, Cardiff University, CF10 3NB, UK.
Vision Res. 2007 Oct;47(22):2901-11. doi: 10.1016/j.visres.2007.01.007. Epub 2007 Feb 22.
An experimental study of lateral displacement of ganglion cells (GCs) from foveal cones in six human retinas is reported. At 406-675 microm in length, as measured in radially oriented cross-sections, Henle fibers are substantially longer than previously reported. However, a new theoretical model indicates that the discrepancies in these reports are mainly due to meridional differences. The model takes into account the effects of optical degradation and peripheral ON/OFF asymmetry and predicts a central GC:cone ratio of 2.24:1. It provides estimates of cumulative counts and GC receptive field density at 0 degrees -30 degrees along the principal meridians of the visual field.
本文报道了一项关于六个人类视网膜中神经节细胞(GCs)从中央凹视锥细胞横向位移的实验研究。在径向取向的横截面中测量,Henle纤维长度为406 - 675微米,比先前报道的长得多。然而,一个新的理论模型表明,这些报告中的差异主要是由于子午线差异。该模型考虑了光学退化和周边开/关不对称的影响,并预测中央GC与视锥细胞的比例为2.24:1。它提供了沿视野主子午线0度至30度的累积计数和GC感受野密度的估计值。