Harmening Wolf M., Sincich Lawrence C.
Department of Ophthalmology, University of Bonn, Bonn, Germany
Department of Optometry and Vision Science, University of Alabama at Birmingham, Birmingham, AL, USA
Photoreceptors in the retina constitute the cellular building blocks of the initial stage of vision. To isolate the contribution of a single cell to any percept is quite challenging because normal ocular optics and motion distributes light from small stimuli over many photoreceptors. Recent microstimulation techniques coupled with adaptive optics scanning laser ophthalmoscopy can produce stimuli as small as single photoreceptors that can be directed to precise locations on the retina. This enables direct study of cone activity and how it relates to visual perception. We provide an overview of the technology and recent results obtained with cone-targeted psychophysics.
视网膜中的光感受器构成了视觉初始阶段的细胞组成部分。由于正常的眼光学和运动将来自小刺激的光分布在许多光感受器上，因此要分离单个细胞对任何感知的贡献极具挑战性。最近的微刺激技术与自适应光学扫描激光检眼镜相结合，可以产生小至单个光感受器的刺激，并可将其引导至视网膜上的精确位置。这使得能够直接研究视锥细胞的活动及其与视觉感知的关系。我们概述了这项技术以及通过针对视锥细胞的心理物理学获得的最新结果。
