I don't know about eye strain, but my brain can very easily tell from specularity cues whether I'm looking at a passively lit or back-lit screen. This matters b

I don't know about eye strain, but my brain can very easily tell from specularity cues whether I'm looking at a passively lit or back-lit screen. This matters because my brain apparently associates back-lit screens with wakeful activities and keeps me from going to sleep. My brain can't really tell the difference between an E-ink screen and a book (when illuminated by ambient light), so I prefer to read on an E-ink screen before bed.