04-27-2016, 01:58 PM
I can picture basic things in a different space like geometric shapes. If I want more detail, I kind have to swap between the mental image and the real image.
I'd compare that to depth focus in a way. If you hold an object in your hand close to your eyes and there is a picture far away on a wall, it's hard to see both well at the same time. I think it's similar if a person is holding on a mental image while attempting to pay attention to a real image or shifting focus betweeen them.