Sakurai Masato, Mullen Kathy T
McGill Vision Research, Department of Ophthalmology, McGill University, Montreal, Que., Canada H3A 1A1.
Vision Res. 2006 Dec;46(26):4346-54. doi: 10.1016/j.visres.2006.08.016. Epub 2006 Oct 2.
In understanding the basis of the changes in human color vision across eccentricity, one key piece of information remains unknown, whether the relative cone weights of the two cone opponent mechanisms vary. Here we measure detection threshold contours within three planes in a 3-dimensional cone contrast space to reveal the L, M and S-cone weights to the two cone opponent mechanisms, L/M and S/(L+M). We find these remain constant across eccentricity suggesting the underlying structures of the cone opponent mechanisms are invariant. The contrast sensitivities of two poles of the S-cone opponent mechanism also remain symmetrical, whereas small asymmetries develop in L/M opponency from about 15 degrees.
在理解人眼色觉随离心率变化的基础时，一个关键信息仍然未知，即两种锥体细胞对立机制的相对锥体细胞权重是否会发生变化。在此，我们在三维锥体细胞对比度空间的三个平面内测量检测阈值轮廓，以揭示两种锥体细胞对立机制L/M和S/(L+M)的L、M和S锥体细胞权重。我们发现，这些权重在整个离心率范围内保持不变，这表明锥体细胞对立机制的潜在结构是不变的。S锥体细胞对立机制两极的对比度敏感度也保持对称，而L/M对立机制在约15度处开始出现小的不对称。
