I know the lines are all parallel. I can put a straight-edge against them. But I can't make myself actually see that.
An Illusion That’ll Make Your Eyes Bulge
I love optical illusions, especially ones where you know what your eyes are telling your brain is wrong, but you can’t seem to get your brain to see that. The famous Checkerboard Illusion is a great example of this. Look at it: You know it’s an illusion, and you just…
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It's easy to see that the lines are straight if you shift your eyes along a border one box at a time.