0 Best blue light blocking eyeglass lenses up to 420nm

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Specialized lenses that filter out blue light wavelengths up to 420nm, potentially reducing digital eye strain. Eyeglass lenses that block blue light up to 420nm offer targeted protection against potentially harmful high-energy visible (HEV) light. This specific range of blue light, which includes wavelengths from about 380nm to 420nm, is believed to be particularly problematic for eye health and comfort, especially with increased exposure from digital devices. These lenses work by selectively filtering out these wavelengths while allowing beneficial blue light to pass through. This can help reduce digital eye strain, which often manifests as dry eyes, headaches, and blurred vision after prolonged screen use. Additionally, blocking this range of blue light may help maintain natural circadian rhythms, potentially improving sleep quality for those who use digital devices in the evening. The technology used in these lenses often involves special coatings or materials that absorb or reflect the specific wavelengths of blue light, providing protection without significantly altering color perception or visual clarity.

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