All things considered, given your eye issues, I would say the monitor should work out fairly decently for you then.
But to be honest, that PG48UQ display is quite expensive, you could probably save a LOT of money and just buy a 50 inch television with HDMI and use that. If you have a large screen TV now, you could try plugging it in to the computer and testing it out. The sharpness won't be as good, but 95% of the features of the PG48UQ display will go unused in your case. I dunno, worth a try, if for no other reason than just to have some sort of 1st-hand comparison.
Just my opinion, of course.