Herbert Wertheim School of Optometry and Vision Science, University of California, Berkeley, Berkeley, CA, USA.
Department of Ophthalmology, University of Washington, Seattle, WA, USA.
J Vis. 2024 Jun 3;24(6):2. doi: 10.1167/jov.24.6.2.
The spectral locus of unique yellow was determined for flashes of different sizes (<11 arcmin) and durations (<500 ms) presented in and near the fovea. An adaptive optics scanning laser ophthalmoscope was used to minimize the effects of higher-order aberrations during simultaneous stimulus delivery and retinal imaging. In certain subjects, parafoveal cones were classified as L, M, or S, which permitted the comparison of unique yellow measurements with variations in local L/M ratios within and between observers. Unique yellow shifted to longer wavelengths as stimulus size or duration was reduced. This effect is most pronounced for changes in size and more apparent in the fovea than in the parafovea. The observed variations in unique yellow are not entirely predicted from variations in L/M ratio and therefore implicate neural processes beyond photoreception.
独特黄色的光谱轨迹是在注视点内和附近呈现的不同大小（<11 弧分）和持续时间（<500 毫秒）的闪烁光线下确定的。自适应光学扫描激光检眼镜用于在同时进行刺激传递和视网膜成像时最小化高阶像差的影响。在某些受试者中，旁黄斑锥体被分类为 L、M 或 S，这允许将独特黄色的测量值与观察者内和观察者间局部 L/M 比值的变化进行比较。随着刺激大小或持续时间的减小，独特黄色向更长的波长移动。这种效应在大小变化时最为明显，在中央凹比在旁黄斑区更为明显。独特黄色的观察到的变化不能完全从 L/M 比的变化中预测，因此暗示了光感受器以外的神经过程。
