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That's just insane... At my best, I can see 4 at a time. It's somewhat disturbing to see such a major limitation in our visual ability.

At first, I couldn't see more than 4 points at the same time. But, then I follow all points with the eyes making a circle pattern during 15 seconds, and surprising!. I can see the 12 points, and now I can not see the blinking points again. That is really crazy...

I tried that same pattern, but the most I could see was 4 at a time. So now I wonder, is your brain remembering what it saw and assuming it's still there, or is there enough information that your brain is now better able to interpret what it's seeing in your peripheral vision...

I am not sure, but it is not funny anymore because I see the 12 points every time. Maybe my brain just recorded the pattern and remember it. I can not switch back again.
Also is truth that I work with crystal simetry pattern daily, so, maybe my brain is trained to see patterns and keep it. Also, in this occasion, I knew what was looking for...
This make me think how different we perceive the universe around us... Even when everybody is seeing the same thing...

Hmm, it may be an actual function of my weak vision. When I get further from the screen, it gets hard for me to see any of the dots. So next I tried to get very close to the screen (normally I keep my monitor pretty far away) and I was able to see about 8 of them at once. I'm guessing having a smaller monitor might help too, based on the article, since I suppose they would be less in our peripheral vision then.