On this page you find a nice collection of geometric illusions and effects.
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There are only black and white squares in this image. Nothing else.
You can see a central "bulge" even though the checkerboard is fully regular and just made of squares.
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The gray horizontal lines are absolutely parallel
The horizontal gray lines look like curves. However, all horizontal lines are absolutely parallel.
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The two horizontal lines are parallel
In the picture the two horizontal lines are parallel, no curves.
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Two straight, parallel lines
Two straight, parallel lines - the bend in the middle is only visual illusion.
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You see a correct square, don't you?
The picture has a real square in it. The curve effect is only an optical vision.
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Optical illusion: the black lines are all parallel
The black lines are all parallel.
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Can you follow the thin line from top to bottom?
Follow the white rabbit, ahh no, follow the thin line from top to bottom.
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Straight black grid
In this image the black grid is absolutely straight.
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Parallel lines
Another geometric illusion: The four vertical lines are parallel.
Do you like the geometric illusions? Do you have feedback on the pictures? Please write a comment.
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