What is a stereogram?

What is a stereogram?

Another type of stereogram consists of two images taken from slightly different angles, viewed through a stereoscope so that each eye sees only one image. Cross-view stereograms are also fun.

How do stereograms change the shape of the image?

The stereograms above are designed to be viewed wall-eyed, by allowing your vision to focus on a point behind the image. If they are viewed cross-eyed, by focusing on a point in front of the image, then the effect will be reversed. So instead of seeing a 3D tricycle or airplane, you will see a tricycle or airplane-shaped hole.

What is a cross-view stereogram?

Cross-view stereograms are also fun. Autostereograms can be viewed wall-eyed or cross-eyed. The stereograms above are designed to be viewed wall-eyed, by allowing your vision to focus on a point behind the image. If they are viewed cross-eyed, by focusing on a point in front of the image, then the effect will be reversed.

How do you do the Magic Eye stereogram?

The Magic Eye series of books popularized stereograms in the 1990s. Hold the image below close to your eyes and allow your eyes to unfocus slightly until an image pops into view. Do you see the tricycle? Once it is in view, you can even move your head slightly to see the 3D image seem to hover in place.

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