Well, You gave te answer yourself.
“…..for years and year…”
I’m sure You use the standards with small scales, like much stronger color differences than in reality. The merge in a mess thing can be seen with 1/1 scale real items at a distance. A 15 mm is like a real human in a long distance.
I’m lucky, even with 60 I need no optical aids. But some of my friends got the problems decades ago.
