Blue light filter is a program, which blocks the blue light sourcing from monitors and can change the screen colors. If you staring at a computer all day and don’t use it then the harmful blue light will pass through the cornea and lens and reaches the retina
Blue light filter protects the retina from the vigorous rays from straining the eye. Also, you can choose different types of mode while you watching a movie, reading an Ebook, playing a game and etc. This is how you choosing the mode.
I recommend that has excellent blue light software is called Iris software.
You won’t need glasses and you can get the software for many different operating systems such as Windows 10.