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Blue Light Filtration

Meaning

Blue Light Filtration is the clinical practice of selectively blocking high-energy visible light, specifically wavelengths in the 450 to 495 nanometer range, particularly during the evening hours. This intervention is essential for protecting the integrity of the circadian rhythm and the neuroendocrine system. Unfiltered blue light exposure in the hours before sleep is a significant environmental disruptor of internal biological timing. This deliberate light management strategy is a non-pharmacological approach to improving sleep architecture and hormonal signaling.