Learn more› By Kaitlyn Wells and Zoe Vanderweide If you believe the hype, blue-light blocking glasses will prevent headaches, decrease eyestrain, and help you sleep like a baby. But do they work?

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Photo: Rikard Osterlund For 12 evenings across January and February, 11 temporary light artworks and sculptures are dotted among the skyscrapers of east London for Canary Wharf Winter Lights.