Minds eye drawing?

for about a year I have been able to draw a few fast crude lines and then start to see a picture or image on the paper that I did not draw or is visual to anyone else unless I trace the lines out.

is there mind’s eye or visual tracking method of thinking? does anyone else see this type of thing while drawing?

PS. I was born cross-eyed and had 3 operations where they cut the whites of my eyes. could that have any effect?