Moreland J D, Robson A G, Soto-Leon N, Kulikowski J J
Department of Communication and Neuroscience, Keele University, Staffordshire, UK.
Vision Res. 1998 Nov;38(21):3241-5. doi: 10.1016/s0042-6989(98)00013-3.
A modified Moreland anomaloscope was used to examine two subjects, one with dense macular pigment, the other with relatively light pigmentation. Chromatic visual evoked potentials (VEPs) were elicited from these two subjects using coarse, isoluminant gratings of different sizes. Colour-specificity was verified by comparing chromatic onset VEPs (reflecting sustained activity) with chromatic reversal VEPs (reflecting mainly transient activity) and also by Fourier analysis (colour-specific responses are dominated by the fundamental, transient activity by the second harmonic). Achromatic (transient-type) intrusions, produced by large blue-green gratings could be related to the extent of subject-specific macular pigmentation.
使用改良的莫兰德色觉异常仪对两名受试者进行检查，一名受试者黄斑色素沉着浓密，另一名受试者色素沉着相对较浅。使用不同大小的粗的等亮度光栅，从这两名受试者身上引出彩色视觉诱发电位（VEP）。通过比较彩色起始VEP（反映持续活动）和彩色反转VEP（主要反映瞬态活动）以及通过傅里叶分析（彩色特异性反应以基波为主，瞬态活动以二次谐波为主）来验证颜色特异性。由大的蓝绿色光栅产生的无色（瞬态型）干扰可能与受试者特异性黄斑色素沉着的程度有关。
