I'm a little late to the party but I wanted to see how XOOX's eyes are doing? Did you get used to the strain?
I just bought a new Iphone and am experiencing very similar issues. I can't look at the phone for even a few seconds without feeling mild eye strain. I have reading glasses too and this has never been a problem for me on my old Blackjack or looking at any computer monitors. Heck, I'm an accountant and I stare at Excel spreadsheets all day without pain, but the Iphone has broken me.
Anyway, just wanted to see if you eventually got used to it or if you returned it.