If you have trouble reading on a LCD tablet or monitor try turning down your brightness. They are always too bright for me. On the monitor you can adjust the contrast as well. I keep my monitor turn down almost half way.
On a Android Tablet you can get an app called
Screen Dim made by a member here that will allow you to adjust both. I have no problems using LCD as long as I turn down the brightness down to a comfortable level.
I could never use my Kindle Fire without the Screen Dim app in the dark. Sure 2% is find in a lighted area but in the dark, no way. Of course everyone's eyes are different but this is what works for me.