Blue light is everywhere. It's in sunlight, but it's especially common in digital devices: iPhones, laptops, tablets and computer screens.
Protect young eyes. Blue light exposure from screen use can negatively impact our eyes and sleep patterns in the long run. This is especially true in children, where younger eyes are developing.
Worse at night. Blue light makes your body clock go funny. It blocks melatonin - the thing that reminds your body when it's time to go to sleep.