The study's findings suggest that visual snow symptoms worsen with color modulation that increases S-cone excitation. The authors theorize that this is because S-cone signals travel on primordial brain pathways that regulate cortical rhythms (koniocellular pathways), which may contribute to the development of visual snow disorder.

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Reference

Hepschke, J. L., Martin, P. R., & Fraser, C. L. (2018). Short-wave sensitive (“blue”) cone activation is an aggravating factor for visual snow symptoms. Frontiers in neurology, 9, 910. https://doi.org/10.3389/fneur.2018.00910