Volbrecht Vicki J
J Opt Soc Am A Opt Image Sci Vis. 2016 Jul 1;33(7):1226-35. doi: 10.1364/JOSAA.33.001226.
If stimuli are made sufficiently small, color-normal individuals report a loss in hue perception, in particular a decrease in the perception of green, in both the fovea and peripheral retina. This effect is referred to as small field tritanopia. It is not clear, however, how rod input may alter the dynamics of small field tritanopia in the peripheral retina. This paper looks at peripheral hue-naming data obtained for small stimuli at mesopic and photopic retinal illuminances under conditions that minimize (bleach) and maximize (no bleach) rod contribution. The data show that attenuation in the perception of green occurs with larger stimuli in the no-bleach condition than in the bleach condition. As retinal illuminance increases, the stimulus size that elicits small field tritanopia decreases, but the stimulus size is still larger under the no-bleach condition. Small field tritanopia in both the bleach and no-bleach conditions may be related to short-wavelength-sensitive (S) cone activity and its potential role in the mediation of the perception of green. The differences in stimulus size for small field tritanopia may be explained by rod input into the magnocellular and koniocellular pathways, which compromises the strength of the chromatic signals and creates a differential loss in the perception of green as compared to the other elemental hues.
如果刺激足够小，色觉正常的个体在中央凹和周边视网膜都会报告色调感知丧失，尤其是绿色感知下降。这种效应被称为小视野蓝色盲。然而，尚不清楚视杆细胞输入如何改变周边视网膜中小视野蓝色盲的动态变化。本文研究了在最小化（漂白）和最大化（无漂白）视杆细胞贡献的条件下，在中间视觉和明视觉视网膜照度下针对小刺激获得的周边色调命名数据。数据表明，在无漂白条件下，与漂白条件相比，较大的刺激会导致绿色感知的衰减。随着视网膜照度增加，引发小视野蓝色盲的刺激大小减小，但在无漂白条件下刺激大小仍然更大。漂白和无漂白条件下的小视野蓝色盲可能与短波敏感（S）锥体活动及其在绿色感知介导中的潜在作用有关。小视野蓝色盲刺激大小的差异可能由视杆细胞输入到大细胞和小细胞通路来解释，这会损害色信号的强度，并导致与其他基本色调相比绿色感知的差异丧失。
