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Blue Light Restriction

Meaning

Blue light restriction is the intentional, systematic reduction of an individual’s exposure to short-wavelength light, specifically within the 450–495 nanometer spectrum, particularly during the evening hours preceding sleep. This practice serves as a targeted chronobiological intervention utilized in clinical settings to prevent the suppression of endogenous melatonin production. It is a foundational strategy for maintaining circadian rhythm integrity, thereby optimizing sleep quality and the crucial nocturnal hormonal cycles.