Here is where it gets really confusing. Fish feed on microscopic organisms especially through the ice. Since no line no matter what pound test is not microscopic in size. It has to be plainly evident that fish can see any line.
Over the years of fishing. I think thickness of line has more to do with affecting how a fish reacts to your presentation. In that the bait or lure moves in a more natural way. Fish act and re-act on instinct not rational thought processes.
Have used golden Stren and blaze orange Stren and any other kind and color you can think of. Never seemed to make much difference either way. When I was young and poor. My favorite line was whatever was on sale.