ELI5: Explain Like I'm 5

The Blue Light (fairy tale)

Once upon a time, there was a special kind of light called blue light. Blue light is a type of light that we can see, but it's even more special because it can help us do lots of things like see better in the dark and even help us feel awake and alert during the day.

But just like how eating too many sweets can make us feel sick, looking at too much blue light can make our eyes and brains feel tired and strained. So it's important to not look at too much blue light, especially from our computers and phones, especially at night when we want to get ready for bed.

That's why sometimes it's a good idea to wear special glasses or use special filters on our screens to help block out some of the blue light and keep our eyes and brains feeling happy and healthy. The end!