Thresholds of Vision of the Human Visual System: Visual Adaptation for Monocular and Binocular Vision

Thresholds of vision under low-light conditions have been studied for determining the human response to light stimuli in different contexts. Blackwell´s work on thresholds of vision of the human visual system did not explore some variables whose analysis would help to characterize more deeply the visual system. This paper extends Blackwell´s results exploring new dimensions of the human visual system response including chromaticity of the stimuli, mono/binocular vision, and dark adaptation. Tests have been performed on a sample of 45 observers, with a simplified laboratory setup with respect to Blackwell and without specific hardware/software, producing results in terms of visual adaptation, monocular, and binocular vision and aging effects.