48 here with bi-focals. I just sit far enough back from the monitor that I can see it clearly. If I lean in close for detail -just lift your head to look thru the reading part of your glasses. I have a 19" monitor, and don't have clearness problems. As far as seeing a/c against the trees, as others have said, that's what camoflauge is for - although that big red icon is sort of a dead giveaway . . .