Your eyes are very low resolution outside of the center of your vision, so your brain makes up a lot of missing info to prevent you from noticing. Try reading this comment without moving your eyes, for example. Keep them straight ahead. It is impossible.
Yeah this, most of the sides of the retinas are meant for color distinction and not granular details, the only detailed part of our eyes is very close to center
12. The only way I found to mostly break the illusion is to zoom in and you can see 3 at a time. If you rotate your phone, you may be able to see two at once.
It's a sneaky one and I don't remember it working this well on me.