When using ourย digital devices, their screens emit a whole spectrum of visible light, includingย High Energy Visible (HEV)ย light, which we see as the colourย blue. This is the same highly energetic light emitted by the sun. Before digital screens, our eyes would only ever usually have to cope with this highly energetic light for during the day. However today, we are exposing our eyes & brains to HEV more and more, which can lead toย migraines, double vision, blurry & dry eyes and insomnia.