A couple of optical illusions

A couple of optical illusions I stumbled across this evening that I thought I’d share with you all:


Believe it or not, both the orange circles and the squares containing them are exactly the same colours. Check it with your computer if you don’t believe me (or try squinting…?)


I promise you that this is an entirely stationary image. Click here for a larger and even scarier version.

Both files sourced from Wikimedia Commons.

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