the brain sees what it wants to see, i saw the 13 cirlces very easily & I thought thats way to easy,& that there might be more to it, kinda like an optical illusion or something, maybe there are some hidden or something and noticed that the further way the more three-dimensional it looked. so i blurred my eyes until, where the dozens of lines converged (where it looks like diamond shapes, in the centers of those) until they blurred together enough to form a circluar shape.
like how you see the circluar shape here. it's all in how you want to look at it.
and how your mind sees a fimalar shapes and how it interpts what it sees.
here is some crazy info for you all here.
Our eyes and brain, however, can play tricks on us. Some images won't let our brain create a single interpretation. Our brain groups the information we see in four ways.
1.Similarity: we will group dots of a similar color together to form shapes.
2.Proximity: when items are placed close together, we will see them different from if they were equally spaced.
3.Continuity: although dots might appear random on a page, our brain will group the dots together to see a pattern.
4.Closure: our brain will fill in gaps to form objects that are familiar.
We see in three dimensions. We use clues of depth, shading, lighting, and position to interpret 3-dimensional images. In 2- dimensional images when such information is absent, our brains use the rules of perception described above
Not only is our vision affected in this way, but also we can hear things that aren't really there. When people see spots that do not exist it is because the eyes and brain respond differently to light and dark areas. The eye compensates by turning down brightness of an area surrounded by light.
articles/the-spinning-women-paradox
the-spinning-women-paradox I see her spinning in both directions.