Exposure to blue light in the evening sends a misleading "wake-up" signal to the brain, disrupting the natural processes that promote a restful night's sleep. The main culprits are the devices that have become integral to our daily lives—computer screens, smartphones, LED lights, TVs, and even the light inside your fridge all emit high levels of blue light. If you spend hours every day under artificial light or on digital screens, computer glasses are an ideal solution.