Are the middle cirlces in each cluster the same size?



Yes! The center circles are exactly the same!

This is direct comparitive perspective! On the left side, the
center circle is large COMPARED to the surrounding circles...
On the right, the center cirle is small compared to the
surrounding circles. Overall, there is an illusion that the
center circle on the right is smaller than the left one.

Send this trick to a friend!....