Get the 8 Plus. You'll enjoy your phone and life in general more if your eyes don't hurt.
Agree 100%. That’s what I did. Life is too short to stress over a cell phone. I loved the X and really liked Face ID but the phone gave me headaches so I gave it to my wife (she loves it and has not issues with it) and got an 8+. Despite being an older design, it is a great phone and, internally, not that much different than the X. One big plus for me is that I greatly prefer the aspect ratio of the 8+. That was the only thing I didn’t like about the X.