I just became aware of what is called a blue light protector. It is a piece of glass or plastic which covers a display and filters out a spectrum of blue light and/or uv.
Anyone tried a blue light protector?
Here is an advertisement for one brand of these things (I am not associated or promoting it in any way):
So something that I have not seen mentioned in discussions of eye strain is whether displays are putting out UV light. And if they are, how much? It seems strange to me that at least some of the companies selling these filters would advertise them as blocking UV if UV is not a problem. I also have seen it mentioned around the net that some newer displays have a UV protection layer in the display.
Also, I think that my eyes have become permanently damaged, and I wonder how blue light and/or UV light have played a role.