Do you work on the computer until late? You should consider trying this app that removes the blue hues from your monitor after 9pm: https://justgetflux.com/ (Apparently, blue coloured light is a cue our brain uses to know when to wake up—morning light has more blue than evening light)
If you are a linux user gtk-redshift does the same thing, I've also found it be very reliable with ATI's binary drivers (though these days I use the open source drivers anyway).
