You answer:

Blue light is the kind of light that comes from your smartphone, tablet and computer screen. It's safe to look at for short periods of time, but can cause eye strain if you're staring at it for long periods of time. For this reason it is better to choose a proper protection of for your eyes. That is why I have chosen https://vintez-technologies.com/collections/monitor-privacy-filters which is a good service in this situation. These filters are called monitor privacy filters, and they work by reducing the amount of blue light coming from your screen.