Niepel G, Päärmann A, Dodt E
Max-Planck-Institut für physiologische und klinische Forschung, W.G. Kerckhoff-Institut, Bad Nauheim, Federal Republic of Germany.
Graefes Arch Clin Exp Ophthalmol. 1990;228(3):264-9. doi: 10.1007/BF00920032.
Transient electroretinograms to a reversing color-contrast checkerboard pattern (P-ERG) were recorded in a protanomalous, a deuteranomalous, and a normal observer. Alternate monochromatic checks were of constant wavelength (630 nm red-531 nm green), while the relative energies were varied systematically. When changing the radiance ratio 630 nm-531 nm of the stimulus, the normal subject exhibited a P-ERG to all stimuli with only a relative amplitude minimum at a distinct radiance ratio, whereas the color-deficient observers failed to show a P-ERG at some color contrast 630 nm-531 nm, the radiance ratio of which was different in the protan and deutan. From the radiance ratio of color contrast for the smallest potential in the normal observer, we conclude that the green- and red-sensitive cone mechanism provides a difference signal which generates the response. The data from the color-deficient observer support the view that color discrimination in protans and deutans is reduced because the input of one type of photoreceptor is missing.
对一名红色弱、一名绿色弱和一名正常观察者记录了对反转颜色对比棋盘图案的瞬态视网膜电图（P-ERG）。交替的单色方格具有恒定波长（630纳米红色 - 531纳米绿色），而相对能量则系统地变化。当改变刺激的630纳米 - 531纳米辐射率比时，正常受试者对所有刺激均表现出P-ERG，仅在特定辐射率比下相对振幅最小，而色觉缺陷观察者在某些630纳米 - 531纳米颜色对比下未能显示出P-ERG，其辐射率比在红色弱和绿色弱个体中有所不同。从正常观察者中最小电位的颜色对比辐射率比，我们得出结论，绿色和红色敏感锥体机制提供了一个产生反应的差异信号。色觉缺陷观察者的数据支持这样的观点，即红色弱和绿色弱个体的颜色辨别能力降低是因为缺少一种光感受器的输入。
