"The blue-light emitted from digital screens can lead to migraines, screen headaches, strained eyes and insomnia. An effective solution can be blue-light blocking computer glasses. The Foxmans™ frames block HEV blue-light emission from all of your digital screens, keeping you protected both whilst working and playing online. Power-up your Everyday Lennons. The Lennon Blue-light Blocking Clip-ons block 100% of all HEV blue-light between 100-520nm spectrum and 100% from 400nm, when combined with the Lennon Everyday frames. These clip-ons give you extra protection as and when you need them. Also included are Solar Clip-ons, transforming your computer glasses into polarised sunglasses, for when you are out and about on a sunny day!"