Personaly, I'm using only one eye, but even so, I ve had a hard time positionning my eye at the right place in front of the screen. I wonder how "normal" people manage...

I've noticed that depending how I put my glasses, I can read or not what is on the screen... but this adjustment is very tricky.

I've also noticed that depending how close my eye is from the screen, I see all the corners or not...