Advantages and disadvantages of human dichromacy.
Advantages and disadvantages of human dichromacy.
复制标题
人类二色性的优点和缺点。
作者：
L. Sharpe;Emanuela de Luca;T. Hansen;H. Jägle;K. Gegenfurtner
我们比较了三色视者（色觉正常者）与X连锁二色视者（缺乏长波长敏感（L）视锥细胞（protanopes）或中波长敏感（M）视锥细胞（deuteranopes））的视锥细胞隔离刺激的视觉检测阈值。在低（1 Hz）的时间频率，二色视者有显着更高的（两倍）的阈值比三色视者的所有颜色的刺激，而在高（16 Hz）的时间频率，他们的表现一样好或更好的三色视者。二色视者在检测高时间调制目标中的优势可以与通过替换剩余的L-或M-视锥类型的增加的数量有关。然而，它们在检测低时间调制目标方面的缺点，甚至在它们增加的视锥光感受器的数量可能被预期是有益的颜色空间的方向上，在L-M视锥相干性的损失和视觉通路不能重组以允许检测低频亮度调制方面得到最好的解释。
We compared the visual detection thresholds for cone-isolating stimuli of trichromats (those with normal color vision) with those of X-linked dichromats, who lack either the long-wavelength-sensitive (L) cones (protanopes) or middle-wavelength-sensitive (M) cones (deuteranopes). At low (1 Hz) temporal frequencies, dichromats have significantly higher (twofold) thresholds for all colored stimuli than trichromats; whereas at high (16 Hz) temporal frequencies, they perform as well or better than trichromats. The advantages of dichromats in detecting high temporally modulated targets can be related to an increased number, through replacement, of the remaining L- or M-cone type. However, their disadvantages in detecting low temporally modulated targets, even in directions of color space where their increased number of cone photoreceptors might be expected to be beneficial, are best explained in terms of the loss of L-M cone opponency and the inability of the visual pathways to reorganize to allow the detection of low-frequency luminance modulation.
DOI：
10.1364/josaa.17.000499
发表时间：
2000-03-01
影响因子：
1.9
作者：
Carroll, J;McMahon, C;Neitz, J
通讯作者：
Neitz, J