I have to admit I don't understand your argument, but in my experience: Stereograms are NOT meant to be enjoyed from across a room. It's REALLY hard to 'catch

I have to admit I don't understand your argument, but in my experience: Stereograms are NOT meant to be enjoyed from across a room. It's REALLY hard to 'catch' a stereogram from far away, so why are you even trying? However, the "focusing on-or-through a transparent thing" that WhiteSage mentions works well at slightly further distances and can be used to help you figure this stuff out.