Seeing and believing

I somehow missed this 12 Dot Illusion when it was doing the internet rounds.


There are 12 dots in the diagram but we can only see some of them at the same time. The others seem to disappear until we shift our gaze.

There is a long explanation, if you are interested, but in a nutshell, all optical illusions are artefacts of the way our vision works. Seeing shouldn’t be believing.

2 thoughts on “Seeing and believing”

  1. The Twelve Dot Illusion is a new one to me but it illustrates (if that is the proper word) the effect that the “blind spot” in the eye’s retina has on perception.

    A more interesting effect is attained at the Zen Garden Ryoanji in Kyoto. There are fifteen upright rocks in such groups that no more than fourteen may be seen from any single position. I can attest to this curiosity. There are views of the garden on Google. What the views do not show is the fact that if you walk through the doors at the far end and turn right, as I did, you will find its unmarked anti-garden. This is an area of the same size overgrown with bushes and shrubs and flowers and weeds. Nowhere have I seen this intended effect mentioned in print, though it must be, somewhere.

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