Contribution of Melanopsin to Discomfort Glare Perception

Blue light often causes discomfort glare, but it is unclear which visual pigments are the main contributing factors. Thus, we conducted an experiment to clarify effects of two pigments, S-cones and melanopsin-expressing intrinsically photosensitive retinal ganglion cells (ipRGCs), by applying a silent substitution method for keeping stimulations L M cones intact in foveal peripheral vision. The color temperatures stimuli were 2700 K 8000 K, luminance value was 1000 cd/m2. background set 5.0 cd/m2 create photopic conditions. Participants exposed glare sequentially evaluated them using pairwise comparisons. results showed that stimulation ipRGCs significantly increases vision whereas does not, indicating play crucial role occurrence caused blue light.