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Exploiting metamerism to regulate the impact of a visual display on alertness and melatonin suppression independent of visual appearance
Using color matching to control how screens affect alertness and melatonin without changing how they look
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Abstract
A five-primary VDU demonstrated a 3× adjustment in while maintaining the same visual appearance.
- Self-reported sleepiness and salivary melatonin levels increased significantly during VDU exposure, consistent with expected diurnal patterns.
- Reducing melanopic-irradiance enhanced the magnitude of increases in both sleepiness and melatonin levels.
- Melatonin onset and sleepiness can be modulated independently of visual characteristics such as color and brightness.
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Key numbers
3×
Increase in
varied by a factor of 3 under matched color and luminance conditions.
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Participants Reporting Increased Sleepiness
Self-reported sleepiness increased significantly under low-melanopic settings.