red lenses glasses block close to 100% of both blue and green wavelengths. While many glasses block only blue light, recent studies have shown that lower wavelengths also have a significant effect on sleep patterns. We block all wavelengths below 550 nm, which includes blue, green and violet.The Dimension:Please kindly checked the picsPACKAGE INCLUDED1*glasses1*box1*fiber cloth1*fiber pouch1*Thank you card
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These are from china, do not order
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