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Blue Light Filtering Efficacy

Meaning

Blue Light Filtering Efficacy refers to the measurable capacity of a material, such as specialized lenses or screen coatings, to attenuate or block high-energy visible (HEV) light in the 400-500 nanometer wavelength range. This metric is crucial in hormonal health because excessive exposure to blue light, particularly in the evening, disrupts the natural circadian rhythm. High efficacy in filtering this spectrum helps to preserve the body’s physiological darkness signal, which is essential for proper neuroendocrine function. Quantifying this efficacy provides a tangible measure of protection against circadian disruption.